Late Aero-Compax typology

So I thought I’d take a run at sorting out the late Aerocompaxes. This is restricted to those models with non-UG/Martel power and it’s all very tentative, so feel free to jump in with catalog info, reference numbers, opinions, comments, additions and refinements.

The first division I’ll make is between 12 hour and 24 hour dials. The 12hr watches seem to be designated UG Cal 130 (which looks like a Valjoux 726) and the 24hr watches UG 90 (Venus 178).

Let’s tackle the 12 hr variants first…

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The UG TDMP (Triple Date MoonPhase) and TD (Triple Date) Thread

We have a Tri-Compax Thread https://omegaforums.net/threads/lets-see-your-ug-tri-compax.95309/
one for the Aero Compax https://omegaforums.net/threads/the-ug-aero-compax-thread.112083/page-7#post-1840088
another one for the Ferrovie dello Stato https://omegaforums.net/threads/universal-geneve-fs-the-other”-railway-watch.55668/
but I couldn’t find one for the Triple Date MoonPhase.

So here we go!
Not too long ago, I was not into TDMPs, more of a UG chrono guy. But…

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Some thoughts on the elusive Contax

Nice article on OF: https://orologi.forumfree.it/?t=80471837#entry674613437

Some of my thoughts:
I have recorded 15 Contaxes with (partial) serial number. To come to an estimate of production I use a couple of methods
1) Known Survivor Rate: based on other batches this number generally lies between 1% and 10% (of course 0% is an option but that is a bit a filosofical thing)
2) Tank formula (see https://en.wikipedia.org/wiki/German_tank_problem).
3) Some gold UG’s have a number…

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