Rate precision from Patek Philippe’s perspective

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One of the successful outcomes of the Patek Philippe Advanced Research project involved a significant reduction of the negative impact of the center – of – mass imbalance on the isochronism of the balance spring itself. A glance at the Spiromax ® balance spring made of Silinvar ® shows that the outer boss is now paired with an inner boss. The outer boss, also referred to as the Patek Philippe terminal curve, improves the isochronism of the balance in all positions by assuring the adequately concentric expansion and contraction of the balance spring. It compensates the disruption of isochronism caused by the escapement and the rotation of the balance regardless of the amplitude. Conversely, the inner boss offsets positional changes of the center of gravity to assure the highest possible rate accuracy in vertical orientations. For the owner, this means that the watch will not run slower or faster regardless of its orientation. The production of hairsprings with the DRIE process guarantees a perfect reproduced geometry, including the positional changes of its center of gravity. Because silicon cannot be deformed, its properties are not affected even when the watch is worn daily. The precisely defined geometry of the inner boss causes a controllable position change of the center of gravity while the spring contracts and expands. This significantly reduces or even eliminates the center – of – mass imbalance of the hairspring during each semi – oscillation. The result is a degree of rate accuracy that exceeds nearly all standards for mechanical watches regardless of their orientation.

Rate precision from Patek Philippe’s perspective

The Patek Philippe Seal imposes very stringent requirements on all of the manufacture’s mechanical watches. The mean rate of movements with a diameter of more than 20 mm must range within – 3 to +2 seconds per day. For Patek Philippe tourbillon timepieces, the tolerance is a strict 3 seconds per 24 hours. Hundreds of repetitive measurements performed by Patek Philippe’s certification laboratories have shown that a mechanical Patek Philippe movement with a Spiromax ® balance spring that has both an outer and an inner boss can be adjusted to a mean rate of – 1 to +2 seconds per 24 hours, which matches the rate accuracy of a Patek Philippe movement with a tourbillon.

Trailblazing technologies for a promising future

The new Spiromax ® balance spring with an inner and outer boss reconfirms the extraordinary benefits of Silinvar ® , the silicon derivative that Patek Philippe launched in 2005 as a world debut. Machining it with the DRIE process allows the geometry of the hairspring to be al tered at any location to systematically influence its oscillation behavior and thus its isochronism. This is an ambitious goal because a precise and dependable rate is an important prerequisite for assuring the successful future of the proud tradition of mechanical timekeeping. For this reason, Patek Philippe’s objective is to gradually integrate the balance spring with this geometry in its current production schedule. But Patek Philippe Advanced Research also extends to other fields as illustrated by the n ext innovation within the framework of this presentation.

TAG Heuer Celebrates 55 Years of the Heuer Carrera

The design alone was destined to set new standards. The watch world had never seen a dial as modern, as tidily comprehensible and as readily legible as the face of the Carrera. Jack Heuer, who was responsible for the model’s design, relied on minimalism to achieve this clarity. “We eliminated all inessential extra subdivisions, which resulted in a totally clear, clean and stylistically pure dial.”

Last but not least, the style that Jack Heuer conceived for the Heuer Carrera also expressed his admiration for modern design. He loved furniture by Le Corbusier and Charles Eames. He liked Oscar Niemeyer’s architecture. And he correctly anticipated that the boom in space travel would further strengthen the trend toward straightforward design.

Especially the early puristic Carrera chronographs with their twin and triple subdials rank among the most handsome watches ever built. Customers’ subsequent requests for a tachymeter scale were granted, which made the dial somewhat more crowded. But the tachymeter was soon repositioned onto the inner tension ring and the fifth-of-a-second scale retreated onto the dial.The earliest Heuer Carreras needed manual winding. An automatic caliber for chronographs was not yet available, so Jack Heuer decided to develop one. To finance the necessarily enormous investment, he joined forces with appropriate competitors such as Willy Breitling, as well as Hans Kocher, the technical director of Buren Watch S.A. and Dubois-Dépraz S.A. The Hamilton manufacturer joined this trio later. The unveiling ensued simultaneously in Geneva and New York in 1969, when the illustrious team premiered Calibre 11, the world’s first automatic chronograph movement with microrotor. This pioneering achievement paved the way toward a bright future for Heuer’s chronographs – first and foremost the Carrera – for everyday use and motorsport.

The Carrera’s first collection was already a worldwide success. By the mid 1960s, the catalogue already included the Carrera 12, Carrera 45, Carrera Tachy, Carrera Deci and Carrera Black models. A world premiere followed in the mid 1970s with the debut of the first chronograph hosting a digital date display on a printed ring.

Exsive collection of Rolex Datejust replica Watches

You are going to want to make sure that you work to get the Rolex replica watches that are available to you at any time. Check out our extensive collection of Rolex Datejust replica watches where you will find only high quality replicas online. These are replica watches that anyone can wear and look good.


Gold is coveted for its lustre and nobility. Steel reinforces strength and reliability. Together, they harmoniously combine the best of their properties. A true Rolex signature, Rolesor has featured on Rolex models since the early 1930s, and was trademarked as a name in 1933. It is one of the prominent pillars of the copy Rolex Oyster collection.

Rolex Oyster Perpetual Datejust 36 replica

In fact, the Rolex Datejust Turn-o-graph replica is one of timepieces with the longest tradition in the Rolex family. As a member of the creative Professional line of Rolex watches, the first Turn-o-graph was unveiled in 1953, with the 40mm-diameter case, Caliber A.296 self-winding movement and water resistance to 50 meters. It is worth mentioning that it was the first Rolex watch with a rotating bezel for measuring periods of elapsed time, which became popular quickly.

Rolex Datejust Diamond Bezel Everose Gold Special Edition-Rolex Datejust collection reveals an elegant temperament and the grand manner. Rolex adopts the quality materials, excelsior craft, and advanced technology to make each piece of series excellent. In addition, all the watches need to go through rigorous tests such as the appearance observation, performance inspection and test on time, to ensure the accuracy and reliablity. Rolex Datejust is not only a model of Rolex watches, but also a watch that reflects the concept of lasting value.

The Latest Rolex Explorer II equipped with the 42mm watchcase

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Since 1971, Rolex Explorer II began to travel around the world, attending countless expeditions. Its 24 hours needles can let speleologists and polar explorers distinguish day and night easily, which is especially valuable. The latest Rolex Explorer II equipped with the 42mm watchcase, which obviously be the perfect equipment for explorers challenge the limit.The arrow on the 216570 is larger and the tip has a point which extends out to the minute markers, whereas the red hand on the 16570 was longer and smaller. Another reason why the new 24-hour hand is so appealing is that the entire hand is colored orange, but the older model only featured a red shaft with a black point. The orange color is an homage to the original Explorer II which was launched in 1971.

Authentic Rolex Explorer II 216570 Orange Baselworld 2011 WatchIt’s finally here. The timepiece we’ve all been waiting for since Baselworld 2011. The new Rolex Explorer II (model 216570) has finally hit stores in the United States and it is as amazing as it looked behind the display case in Basel.

The big change with this new version of the classic Rolex offering is in the size. This time around, the Explorer II has been modernized with a slightly larger 904L stainless steel case. Now stretched out to a 42mm diameter (45mm including the crown), the 216570 rests comfortably on the wrist without weighing your arm down. The thickness or height of the case is 12mm. And although it has been beefed up to an XL, the design still maintains the traditional satin brushed lugs and polished sides. The new bracelet is a heavy duty stainless steel Oysterlock featuring the 5mm Easylink extension.

The next big update, and also the first visible difference, is the new orange GMT hand. Other than the size, this is probably the biggest “wow factor” in this new version. The orange hand pops out against the white or black dial, and matches so nicely with the Explorer II font. The hands on the new 216570 are larger than the older 16570 and hold more lume for a clearer view at night. The lume is Rolex Chromalight that is claimed to last up to 8 hours after a full charge. We have not tested this, but it does seem to last longer than the 16570’s green lume which glows much brighter at first.The updated Explorer II still has a fixed stainless steel bezel with 24 hour markers. The rehault has “RolexRolex” etched on the inside with a serial number at 6:00 and the Rolex crown logo at 12:00.Unlike the newer GMT Master II (116710) which was bumped up to a Triplock crown, the new Explorer II still keeps water and dust out with the protection of the Twinlock screw-down crown and carries a water resistance of 100m or 330ft.

Now on to the engine of this baby! The Explorer II is powered by the newest Rolex caliber 3187 (in-house of course) automatic movement. Even though the watch is capable of displaying two separate time zones, time setting is a cinch with the rapid setting GMT hand.

What does it mean to be a Modern Gentleman?

The Classique 5157 combines a contemporary ideal – an ultra-thin dress watch in white or yellow gold – with characteristic Breguet innovations, from the blued hands in steel to the self-winding movement. The heartbeat of history on your wrist, if you will.The Classique 7147 with black alligator strap. A watch such as this should be just like its wearer – the quiet extrovert in the room. The Arabic Breguet numerals work harmoniously with a more contemporary dial in “Grand Feu”. A watch with refined, modern élan.

That indomitability is its own reward and at the same time a slight curse. Ameliorate its effect on other On champagne: a glass lifts the spirits and sharpens the wits but ‘a bottle produces the opposite effects’s by always being the wittiest, brightest and least boring person you can be.It’s much more important to invest in looks that favour your age, lifestyle and outlook. Whether these come from this season’s collections or a vintage stall is irrelevant. By the way, ‘investing’ is a highly charged word: it’s better to consider clothing and accessories as interesting life partners rather than dull heirlooms.

Does anyone know what ‘timeless style’ actually means? I think what’s important is to find a style that works for you and your personality. I wouldn’t say it is vital to construct a rigid uniform, perse, but by the time you’re in your mid-twenties you should have a pretty good idea of what silhouette and style tics work for you. Use what you know as your sartorial foundations – narrow black jeans or a crisp button-down white shirt, for example – and then pick up various trends along the way. Trends, of course, are cyclical. You might love that red-hot pair of leather cowboy boots now, but how will they look come April

Introducing a Breitling Superocean Heritage

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One of the big announcements at this year’s Baselworld watch fair was the alliance forged between two powerhouse tool watch brands: Tudor (part of the Rolex enterprise) and the formerly independent Breitling, now owned by private equity house CVC Capital Partners.

Under this arrangement, each will supply the other with items missing from their stock list. Thus, Tudor gains access to the Grenchen brand’s BR01 in-house chronograph, while Breitling receives Tudor’s MT5612 automatic movement, now dubbed the B20, which has been put to use in the new Superocean Heritage II series, celebrating 60 years since the launch of its first “dive watch”. Available in 42mm or 46mm automatic and 46mm chronograph versions, all benefit from a ceramic ring adorning the steel bezel, to minimise wear, as well as subtly updated hands and markers. In addition, the COSC-certified B20 movement now delivers 70 hours of power reserve.

All models feature blue, black or bronze finishes and a choice of strap material: crocodile, rubber and a new rubber-leather composite. Alternatively, a mesh strap can be fitted, in line with the 1957 original.

Breitling Chronomat Automatic GMT

As ever today with watch collectors and aficionados, along with fashion forward men and women throughout the globe. The average size today on most men’s timepieces is approximately 42mm in diameter, while the average size on most women’s watch styles is approximately 37mm in diameter.

The oversized watch trend started in the early part of this century with popular watchmakers TAG Heuer, Invicta, U-Boat and Breitling offering extra-large models for men with cases measuring more than 42mm in diameter and 15mm thick. The trend was soon adapted for women by watchmakers TechnoMarine and Michele, who introduced larger scale women’s watches with chronograph dials and generously oversized cases. Prior to this, most men’s watches averaged 37mm to 39mm diameter in size, while most women’s watches were well under 30mm in diameter in size.

Bold, amply proportioned timepieces for men and women are the focus of attention this week at World of Watches with our Oversized Watches: Go Big Or Go Home Event for 2017 event. Over 250 popular styles are featured in the promotion, including highly-sought after styles from Invicta, Lucien Piccard, Breitling, Michael Kors, TechnoMarine, Raymond Weil, Ingersoll, U-Boat, Glycine, Casio, Luminox and Swiss Legend.

Invicta watches have been at the forefront of the oversized watch movement and the Swiss-made Invicta Reserve Chronograph in stainless steel does not disappoint with a robust 52mm diameter, 22mm thick case in brushed stainless steel, presented on an attractive triple-link bracelet in brushed and polished stainless steel with black ion-plated stainless steel accents on the bracelet, crown and push-piece covers.

The unidirectional rotating stainless steel bezel with a screened black enamel top ring surrounds the black dial with three subdials, date and day windows, luminous skeleton hands and markers. Features include 1/10th of second, small-second and 30-minute countdown timers.Additional features include a scratch resistant Flame Fusion crystal above the dial, a locking screw-down crown and case back for water-resistance to 500 meters or 1,650 feet and premium quartz movement inside.

Rolex President

The Rolex President is noted as the most luxurious of all luxury watches. When the watch was first released to the market in 1956 and named the Rolex Day-Date, it quickly overtook the Rolex DateJust as the brand’s high-end watch model. When President Eisenhower was spotted wearing a Rolex Day-Date in public, the watch was quickly coined the Rolex President.

In the tennis world, the Rolex President is tied to Roger Federer. In fact, as he hoisted his 2012 Wimbledon trophy over his head following his victory over Andy Murray, upon his left wrist was a 41mm Everose Rolex President provided by the Rolex Company. Much like Federer, the Rolex President is a true classic and amazingly precise.

Once again, some of the world’s most influential women wear both the ladies and men’s versions of the President Rolex. Stars associated with the Rolex President include Jennifer Anniston, Hillary Clinton, Victoria Beckham ( she loves her Rose Gold Daytona ), Renee Zellweger, and many more.

New and pre-owned Rolex President Watch models are available in a wide variety of styles. One can choose from the most simple and classic models featuring 18k yellow gold and diamond less face to a platinum model with plenty of diamond bling. Some of the hottest Rolex President models are those with Rose gold, oversized cases and bracelets, and rare vintage models.

Both the Rolex President and the Rolex Daytona are amazing investments in today’s world. Much of their value is based on the high-demand of both precious metals and Rolex watches in general. If you are going to buy a new Rolex, be sure to select an Authorized Rolex dealer to ensure authenticity. There is sure to be one around you but click here for a list of Rolex dealers near you. If, however, you prefer to save money and buy a pre-owned Rolex, be sure to deal with a reputable dealer with a solid reputation, impeccable reviews, and preferably one that belongs to the Better Business Bureau. BobsWatches.com prides itself on being the most trusted reputable pre-owned Rolex dealers in the US so please be sure to visit us or call for information on our fabulous selection of used Rolex watches for sale, including the Rolex Daytona and the Rolex President.

Another factor to the Rolex Daytona and Rolex President buying process is deciding on purchasing vintage or contemporary models. Vintage models are those released to market in the 1970s and earlier. One never really knows when a particular vintage watch can explode in value. The rare vintage Rolex watch market is quite hot currently. With a bit of research, it is possible to find rare vintage watches that are amazingly unique and valuable.

No matter which way you stack it, both the Rolex President and the Rolex Daytona are amazingly beautiful watches for wear both on and off the tennis court. Finding the Rolex of your dreams can be an enlightening adventure…full of fascinating history, discovery, and inspiration!


The Rolex Air-King, for most of its very long history, was the simplest, least expensive Rolex, but also in some ways the purist’s Rolex. With no date, a 100 m water resistant case, screw-down crown, and chronometer certification, it had every essential attribute that makes a Rolex , with no distractions. In 2014, however, it was discontinued, and its status as the entry level Rolex as well as the purist’s Rolex was taken in 2015 by a new version of the Oyster Perpetual. In 2016, however, the Air-King returned and it is emphatically not your father’s Air-King. With a 40 mm case, new “Superlative Chronometer” certification, complete overhaul to the dial, and the same arrangements for resistance to magnetism as the Milgauss, it may be an Air-King in name, but in the hand and on the wrist, it’s an almost entirely new watch.

The Black dial rolex oyster perpetual air king replica watch ref. 116900 features a dial very similar to that on the Rolex Explorer I ref. 214270 we reviewed here; but this time, including a white minute scale with white numerals. The new Rolex Oyster Perpetual Air-King ref. 116900 features a black glossy dial with applied hour numerals at 3, 6 and 9 o’clock.

The new Rolex Oyster Perpetual Air-King ref. 116900 is fitted with the legendary Oyster bracelet with satin-brushed finish. The bracelet features solid links throughout and is fitted with a folding Oysterclasp equipped with the Easylink system that allows the wearer to extend the last link on the bracelet by 5 mm.

The watch is waterproof to 100 meters and its movement is properly protected by its Twinlock screw-down crown and its screwed-in solid case back. The watch is fitted with a sapphire crystal with Rolex’s etched coronet at 6 o’clock. Perhaps the biggest difference of this clasp versus all other modern clasps on Rolex Sports models, is that the Rolex coronet —crown— is this time embossed on bas-relief —low-relief— opposed to being applied and soldered to the clasp.

In fact, it’s such a departure from what we’ve all gotten used to thinking of as an Air-King that I almost wish Rolex had named it something else. The retention of the Air-King name means that you have to struggle a little when you first see pictures of the watch – or when you start wearing it – to see it as its own thing, instead of through the veil of years of exposure to something else that had the same name. What is the same, however – Rolex being pretty good at not totally disrupting the connection of any of its watches to earlier models in particular, and to the basic design codes of the company in particular – is the Air-King logo, as if to reassure the skittish that underneath it all, the Air-King is the same purist’s watch you knew and loved once upon a time.


At Baselworld 2015 yacht-master 40 replica added a new Everose gold Yachtmaster (reference 116655) to their sport line. The bezel is black ceramic with raised numerals and its 60-minute scale. The black dial features classic Rolex Yacht-Master 40 Replica watch filled with blue glow lume.

Yacht-Master rotating bezel fitted with new black Cerachrom word ceramic ring, full of the essence of the Yacht-Master. Polished and bright stereoscopic digital scale appears on the matte words ring exceptionally clear, allow the wearer to easily read a 60-minute timer record. This watch first match of the black surface with luminous hands and hour markers Chromalight stark contrast, lasting luminous materials distribute blue light, in daylight and darkness are legible.

It features the Rolex caliber 3135 automatic movement and the big novelty is in the strap. For the first time, Rolex Yacht-Master 116655 Replica Watch comes with a Rubber strap. It’s a black bracelet made in a soft and flexible rubber with two very soft rubber bands on the internal part of the strap. Solidswiss.cd engineers already start working on the replication of this new Rolex model. The movement will be the classic Solidswiss.cd Rolex 3135 clone caliber and the new Rolex Yacht Master Swiss Rolex Yacht-Master 116655 Replica Watch will be ready for sale when all quality and durability tests are successfully finished.