New to me 1980s coin bezel Seamaster

Is the 1980s modern or vintage, who the heck knows?! Anyway arrived yesterday a 1980s Seamaster 166.0280/366.0880. Hardly mint, but not in bad condition with an Omega service card from early 2019.

Sadly 31mm is too small even for my delicate wrists so it’s entered my wife’s collection for evenings out apparently.