Thought I would share this example, as I have never seen this variant before. Shuck the Oyster just posted it on his site around 45 minutes ago, and it already sold (before I could even see what price he wanted for it): Link: https://www.shucktheoyster.com/universal-geneve-aero-compax-chronograph-890101-01/ Any UG expert have more background on this reference? What / how were the bezel and markers used?
24 hour movement. So the bezel is for a second time zone. Starting a 24 hour marking at “6” is uncommon but not unheard of. In this case it makes sense as 6pm to 6am is the “dark” time.