hello,
My post will serve to identify the different versions produced between 1964 and 1978, focusing on the different hands and indexes that you may encounter. Sorry for my english as it is not my first language.
Aesthetically:
1. Very fine black straight hands, fine index with a black face and silver or gold sides.
2. Notice how the hands and indexes widen. The indexes see their base widen, which makes the chrome become much more visible.
3. Appearance of Tritium and the inscription “T swiss made T”! The silver hands are decorated with a black segment and a tritium segment. Above each index, tritium spheres are affixed.
4. Same Hands/Index/Tritium structure but everything is enlarged. The chrome base of the indexes is even more visible, and the hands have become heavier.
5. New indexes, thin, with within each: 2 silver bars with a thin white bar (tritium?) in the middle. And Dauphine needles.
These indexes are only found with these hands!
I hope it has been useful, thank you
😀 ! Feel free to add more info or tell where I could be wrong as there are so many different version !