This is one of those not so rare days that I am wearing two watches. Two wrists, two watches! Why not? Especially when you are unable to decide which watch to wear! This one is to commemorate the 20th anniversary of the moon landing. I ordered it in 1990, and waited weeks for it. One of 2000 commemorative Speedmaster Professionals issued in 1989, with the factory sapphire back. I am eternally fascinated by it!