The Omega http://www.speedroc.com/replica-omega-speedmaster-broad-arrow.html watch released in 1994 (the Omega calibre 1170) was interesting for at least two reasons. First, it is a central tourbillon. This means that the tourbillon carriage is placed in the center of the dial. Second, the Central Tourbillon is an automatic. If I had to add a third special quality it would be that the hour and minute hands are applied via metallization to sapphire crystal discs (think something similar to Quinting �C though I think Omega��s practice predates them). So the seconds via the tourbillon were at the center, and the minute and hour hands were applied on spinning sandwiched sapphire crystals. The replica omega Speedmaster Broad Arrow GMT watches are all placed in DeVille cases (this far) and are in precious materials. From 1994 �C 2010 Omega released about seven variations of the tourbillon movement. In 1997 the movement grew up a bit to become the Caliber 2600A. What really changed was the application of the automatic winding system that was now part of the movement itself. The watch designs were of course changed as well. In 2002 after a bit of a break replica omega Seamaster 300m came out with the Calibre 2600B. This movement improved upon the 2600A by having it be COSC Chronometer rated. Later in 2004 the Calibre 2600 was skeletonized for the Caliber 2633A Omega Central Chronometer Skeleton Tourbillon watch. Moving forward in 2007 Omega��s technology of today met its tourbillons by including the Co-Axial Escapement as part of the tourbillon. That step really helped thematically integrate the Central Tourbillon with the rest of the brand��s in-house made movements. That was the Caliber 2635A and was placed in a watch with an amusing name called the Omega Central Chronometer Co-Axial Tourbillon Chocolate (because of the dial). Last, as I am sure you can guess, Omega once again added a skeletonized look to the most modern Omega Central Chronometer Co-Axial Tourbillon watch with the Caliber 2636A for the longest named watch (these names just keep getting words added to them), the Omega Central Chronometer Co-Axial Skeleton Tourbillon watch. And there is our brief history of Omega��s Central Tourbillon watch. So what is this piece all about? Of course the main idea was to create a symmetrically pleasing dial that featured a tourbillon mechanism. Doing that made it impossible to have centrally mounted hands. This meant that the hands would have to be mounted elsewhere �C hence whey the sapphire place system is used. The plates sit around the tourbillon and are driven by a small ring-like gear around the bezel of the watch. This also seems to cause a complication in how you adjust the time. Pretty much everything about this watch is uniquely quirky.