I had a 6263 with V23 inside; serviced by Zig, it was a solid mech!
You will need to experiment with the hands, however. Some V72 hands work with certain pinions (I seem to recall hour and minute); subdial hands were from whatever V23 watch plundered for the movement. Center seconds was from my old DW mystery movement, I think? It's been a long time since I've thought about this one, so the details are a little fuzzy...
Don't think I have a modern overlay around; might have an MBW vintage though.
If I'm able to dig this stuff out (and you're in the U.S.), it's on me. Ah heck, even if you're Int'l, it's on me
Yes, you'll need a 2836 replacement datewheel and an overlay to glue on it.
I probably have some old ETA datewheels laying around; a few of which have been stripped of their paint already and would be perfect for an overlay. The lack of paint allows for a better bond with whatever adhesive you choose to use, and also makes for a slight bit more clearance due to the reduced profile; you'll want as much clearance as possible between the overlay and the dial to prevent rubbing, which will cause the date to stick when rolling over.
Hit me up with your shipping info and I'll send you one.
Unfortunately, no. The datewheels are different sizes; inner and outer diameters. the 3135 is just a larger movement than the ETA in general (12.5''' vs. 11.5''' for the ETA), hence allowing for a larger datewheel.
On a 16622, only the bezel/insert and dial are 950PT; everything else is SS (you're only paying for roughly 14g/0.67oz of PT, BTW).
Yeah... MSRP has been creeping up quite a lot in the past few years...
A bit pricey, but not terribly bad compared to some of my other projects
I've still got a few more items to go on this one before I'll call it completed, however