Since it is an "Anniversary" watch, it must be from 1976 - 50 years Nivada, as far as I know.
ETA 2892 (I think my first watch with this otherwise very common movement). Running good for now, although I have no clue about the service history and will have it maintained soon.
Crystal is slightly scratched, I don't think I will be able to do anything about that. Mineral glas.