Throughout its 50-year history, the Omega Constellation 1512.40 men's watch has evolved at an unstoppable pace. The 1512.40.00 mens wristwatch is always up-to-date with the latest fashion in steel and is ever the timeless classic. The 1512.40 has a unique appeal which makes it one of the bestselling watches in the world. The 1512.40.00 is a cornerstone in the Mens Omega Constellation collection. This watch feautres an all steel bracelet with a gray dial.