I am sharing my mint 70s Zodiac Chronograph GMT with Valjoux 72 movement and Pepsi bezel. The watch is actually a re-branded Heuer 2446C GMT. Everything is identical except for the brand name.
... well, very like the Mark 4 generation I mean 馃槈 . Previous dial and/or case are slightly different though. I guess you know the OTD website already (?)
Anyway, it's a very nice watch you have there. Congrats ! 馃憤