This is the Rolex Daytona Cosmograph Color Change Dial in White Gold - Ref. 116509 made in 2005. The dial is referred to as a "Color Change Dial" because the red hands on the white sub dials have caused them to take a reddish hue. This, of course, makes the timepiece more rare, as not all of the sub dials have turned red.

The 40 mm x 12.5 mm stainless steel case (No. D181534) is polished and brushed; it has a screw down case back, pushers and crown. Triplock winding crown protected by the crown guard, tachometer graduation on the bezel to 400 units per hour, sapphire crystal. Satin silver dial with applied black radial Arabic numerals and luminous indexes, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer minute/seconds track. Luminous white gold baton hands.

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This is a rare Rolex Submariner 5513 Tropical Dial No-Date that just sold at Antiquorum's May 13, 2012 auction in Geneva. The estimate was ($10,000 to $14,000) and not surprisingly, it sold for more than the high-end of the estimated value at $14,600. Tropical dial Rolexes - whether it is a GMT, Explorer or Submariner - command a significant premium over the same Rolex with a black dial.

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The Rolex Ref. 8171 "Padellone" Triple Date Moonphase is one of only two models of moonphase watches that Rolex has ever produced. It features a snap on back, as opposed to reference 6062 which features an Oyster screw down back. Produced circa 1950, only about 1,000 Padellones were ever made. Available in 38 mm by 14 mm stainless steel or yellow gold case, if you can find one. This stainless steel example (pictured above) will be for sale at the upcoming Antiquorum auction April 25, 2012 (lot 172). It is in very good condition and has the original signed dial, case and movement.

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According to National Geographic, James Cameron's trip in the Deepsea Challenger submarine took him 35,756 feet (10,898 meters) deep. He traveled where only two men have ever gone, to the Challenger Deep valley of the Mariana Trench (the deepest part of the ocean).

"Falling through darkness--that's something that a robot can't describe," Cameron said. "Most importantly, though, is the significance of pushing the boundaries of where humans can go, what they can see and how they can interpret it." Source: Yahoo

This was the first journey to the bottom of the Mariana Trench in 50 years. In 1960, two explorers, Jacques Piccard and Lt. Don Walsh, descended in their submarine, the Bathyscaphe Trieste, to break the all-time human depth record - 35,813 feet (12,138 meters). During the dive, the Rolex Deep Sea special was strapped to the outside of the sub. Needless to say, the Rolex and the explorers both survived the journey intact.

Fifty years later, James Cameron descended to the bottom of the Marina Trench, with the Rolex Deepsea Challenge strapped to the outside of the sub. The new watch was specifically created for this dive, and is rated to 12,000 meters (39,370) - it made it down and back with no problem.

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The Rolex Yacht-Master looks good with the new blue sunray dial; it contrasts perfectly with the platinum bezel. The design is quite striking, especially in comparison to the previous generation which features a somewhat bland silver on platinum combination.

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Rolex luminescence shots from luxury focused blog K-Thai.

Rolex Submariner 5513 (Circa 1962-1990)

Only produced for a small period of time circa 1959, Square Crown Guard 5512 Rolex Submariners are very rare. They were the first batch of Submariners produced after Rolex switched from ref. 5510 (without crown guards) to ref. 5512 (with square or non-square crown guards).

According to Rolex expert James Dowling, the Tudor Submariner Ref. 7928, Square Crown Guard, Oyster-Prince "Submariner," is "without a doubt, the most rare version Tudor Submariner." He says, "the Square Crown Guard version dates from 1969 only and was the first example of Tudor recycling Rolex "Castoffs."

The first 5512 Rolex Submariner was fitted with square type crown guards, but it was eventually determined that the guards did their job too well and made the crown difficult to unscrew. This subsequently led to more pointed crown guards. The remaining cases were then passed on to Tudor who produced the 7928 for a very short period of time.

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