I would also like to try swapping the movement when I build one. However, I saw a thread on Reddit where a few people mentioned they tried it and had fitment issue specifically with the pushers in the new case, but also that the rep hands did not fix onto the G10 as the axle diameters are different! So it might be worth checking if the hands fit the axles before going through all the trouble of repairing with wire as you might want a different size.
The Sunon PE50 measures 29.75mm x 4.52 mm. In my rep, the PE50 is inside a mounting ring with an outer diameter of 30.5mm and the movement sits well below the height of the mounting ring. All in all, there is a ton of space inside the case.
I was more worried about stem height and the pushers but with a little love, I was able to fit the ETA G20.212, which measures 29.8mm x 5.12mm (including a datewheel you don’t need), into the case of my rep MoonSwatch.
I wish I could send photos but the movement is now in pieces waiting for me to sort out the issue of the two broken pinions.
It’s probably worth noting that there are different versions of the rep case being sold. Mine is
plastic bioceramic (wink wink) and has an actual working battery access door not just a sticker like most seem to have. I’ve heard others have a metallic case back.
So the disclaimer must be stated that, depending on which case your rep comes with, your results may vary.
Of course, if one chooses to go with another case as discussed in this thread, the size of the MoonSwatch case is irrelevant.
As for the hands…
I wasn’t clear but I did check the fit and with minimal effort was able to fit them to the donor movement.
The PE50 hour, minute, and sweep second hands have smaller holes and required a little broaching while the subdial hands fit without modification to the single remaining pinion.
The 32 gauge wire I plan too use to replace the broken pinions, being slightly more than .2mm in diameter, required a little (as in very little) thinning to fit the subdial hands.
The only stumbling block in my attempt to franken the MoonSwatch are the broken pinions on the 10 and 2 subdials of my genuine ETA movement.
And, finally, responding to
@kidcreole …
No need for a trade off my friend. You can have the whole
enchilada po’boy because all of the ETA G10.212 series have sweeping second hands PLUS full chrono functionality!!!
The reason to choose either the AJ or AP version is because they both have the 60 minute subdial at 10, the 1/10 second subdial at 2, and, like the rest of the series, running seconds at 6.
The only difference between the AJ and AP is that the AJ includes PreciDrive (deviation of +/- 10 seconds per year) in addition to the Laptimer and Powerdrive found in both versions.
Hope this info is helpful.