Legit constellation?

MtV

I don’t think so, 265/266 should be sub seconds (265 with 15 jewels, 266 with 17). 283 is a center second, I‘m not sure about the ref. 2640, though.

ConElPueblo

I didn't even notice the central seconds hand, sorry 🤦

Lacazema

He doesn't have anymore photos for the moment. I haven't been able to track down a reference number, it looks closer to a 1950s model, almost like a 1950s seamaster. What is throwing me off is that the applied indexes sit under the "drawn on?" hour marks. The ones I've seen whilst looking for a reference number seem to have the applied indexes on the hour marks. I'm not sure if I'm making any sense. Any info would be welcome ! Thanks again for all of your help