Triple Date Moonphase movements question.

[AliceSliced]

Thank you for letting me join the forum!

Really hoping for some help here.

When going through my late grandad's belongings I have found a beautiful triple date moonphase Zodiac... that's empty. There is no movement inside.

I want to get it up and running as a suprise for my Dad, but I've seen so many conflicting things online about what movement i should be looking for.

I have done some projects for my friends and myself, but I always started by knowing what movement should be inside the watch!

I have a list from hours of scouring the internet of what movements it could be, and would really appreciate some help.

A Schild 1402 
ETA 1164
Venus 203
Valjoux 90
ETA 7751

Please help. Have I misunderstood and I could actually use any of these movements? That seems very unlikely, but they do look very similar! I just don't want to mess this up.

[AliceSliced]

Adding some details.

The case width is 34mm

Case thickness is 10mm



I'm guessing it is from around the 1960s from looking at family photos

[YuriyV]

Inside of the case back should be a reference number. It is what we want to see.

[AliceSliced]

There was no back when I found it. I'll try and go through more of my Grandad's things to see if I can find it. Clearly he was fiddling around with it, so maybe I'll find the original movement too!

[YuriyV]

Pictures of the case would help too.

[bumo79]

As YuriyV wrote, we will ask for pictures, without them only this much is known:

First generation :
- movement hand wind ref. 905 cal.12S or cal.1100
- movement automatic ref. 908 cal.1402

Second generation :
- movement automatic ref. 742-908 cal.74 silver case
- movement automatic ref. 743-908 cal.74 gold plated case

[AliceSliced]

Thank you everyone for helping!

It's a 742-908 with silver case, so I'll go on the hunt for the 74 movement.