Thanks for so many replies! I have taken a few pics with my phone camera - not very good resolution but if anyone has any more thoughts about this watch they would be much appreciated!
I'm not capable of taking the back off, will have to take it to someone.
Really I'm trying to identify what model it is, when it would have been made so that I can tell the person I bought it for about the watch. It's really lovely, has a new strap and runs like a train! I know they will love it and would love knowing some history about it...