The movement found in the vintage Geopysic (P478/BWSBr) and the Mark 11 (488 Sbr) are probably the best.

Yes with a non-lume model or it has fallen off. On the top example, you can still see signs of the lume. They were either dipped in lume at their tips or had conventionally filled dauphine hands.

I'll need a movement photo, but these are typically NOT in-house movements. The serious JLC collectors do not regard them that highly because of that.

Yes, but are correct. When they show luminous material on the dial, the hands are also supposed to be luminous.

You will not find an OEM crystal. No point in even asking around. SO.... whether you send it JLC for whatever they're installing these days, the service will cost you at least 2000 Euros. My recommendation would be to is to install whatever crystal works height-wise and have the shop fit a silver ri...

On the manual wind parking, the black arrows are much closer to the dial edge, and the print is sharper.

So yes, there is a good chance it's a refinish.

I have not been able to confirm or deny its existence. I think it's a later addition, but I have no definitive proof.

Honestly, I don't think I've seen what you have before, at least not in the past 20 years. It's an odd duck. Would be interesting to see what is marked on the insides of the case back and how the movement is branded. It is unusual to have Swiss hallmarks on the outside. Not all US-marked cases were ...

It's probably some period retailer, unless Raymond Weil was not founded until 1976.

"Weil" would be the retailer, usually a jeweler or a department store.