Bill Sohne
1637
Omega made a few differnt models that are Chronometer certified...
Hi
Back in 1973 For Omega 125th anniversary .. The Speedmaster 125. The first triple registered, 24-hour indicator, automatic date chronograph Chronometer produced. Also on a side note, the mineral crystal was the largest that could be produced at the time!! Powered by Omega caliber 1041. 
Close up of the " adj 5 pos and temp" 
Omega also released OMEGA SPEEDMASTER PROFESSIONAL APOLLO XI
powered by 864 chronometer certified version of the 861 ....
Some pics I found on the net...
Once again I just wanted to make the comment that is what I remember off the top of my head and is by far not a complete list of chronometer grade Speedmasters..
Good Hunting
Bill Sohne
Omega made a few differnt models that are Chronometer certified...
Hi Back in 1973 For Omega 125th anniversary .. The Speedmaster 125. The first triple registered, 24-hour indicator, automatic date chronograph Chronometer produced. Also on a side note, the mineral crystal was the largest that could be produced at the tim...
