Looks like a Swiss-made Longines case.

The majority of the chronos are made by Universal Geneve and a few by Valjoux. They are not JLC brand-specific.

The caliber P478 or any of the caliber 450 based family is quite nice too and can be found at a much lower price point than the Geo and Mk 11.

Zaf

I'm pretty sure it's a Longines with a dial that has been refinished as a LeCoultre. Even for LeCoultre at the time, this would be very unusual.

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.