What is the difference between caliber 6497-1 and 6497-2?
There are two variations of the ETA/Unitas 6497 including the 6497-1 and 6497-2. The -1 beats at 18,800vph while the -2 beats at 21,600vph. The -2 can be found in watches like Panerai and typically costs more.
Have you noticed any other differences? Please comment below.