What time is it? Watches and horology

You're right sorry, the Oriosa is 37mm.

But that Cimer is gorgeous. What is the movement? A quick google suggests that it might be a Lapanouse, in which case you'll have a very hard time getting parts to service it. I guess that's why it's cheap.

Edit: looks like it's a Lapanouse 2370, so some parts might be hard to get. When I was getting my Enicar repaired I had to track down a donor movement which was about £60. I'd take a punt on this at £375