Please help identify - No numbers

[Scotto97]

I recently inherited this watch that has no identifying numbers whatsoever.

A well-known and trusted jeweler serviced it and promises it's genuine, but they are unsure of the year and model.

Apparently it is a man's or midsize watch, but I've decided to give it to my wife, as the face is very small by today's standards.

We'd like to switch out the acrylic with a diamond bezel and sapphire crystal to modernize it for her.

So the bezel size needed would also be appreciated - Thank you