Wow, 3 minute telephone markers on the subdial too - great find man!
My first post here. I'm excited about this Forum. Looks and sounds great..
Regarding these markings. I once read that they are somehow related to flying, though could never find any more info about them. Anyone know what use these markings serve? Think I have seem them on Heuers' in the past also.

Is there a sweep second pinion in there? You may be missing the long seconds hand.
That dial is gorgeous. The Valjoux 72 is one of my favorite all time classic chronos. Nice find.