Gary G
3734
Thanks for your excellent questions!
The Carbontime balance proved to be unreliable in use so was eventually scrapped by Kari -- as far as I know none of the Series I chronos actually have that balance, so all watches have a more conventional balance wheel.
Just measured my watch, and with the domed crystal it is 14mm thick. My custom caseback adds 1mm to the thickness of the watch, so the other Chrono IIs are 12mm thick for the case alone, 13mm including the domed front crystal.
Thanks for asking!
Best,
Gary