OMTOM
·What is the caliber Inside (the ref is engraved under the balance wheel but I can't read it)
I think this is a 23.7, probably T2 or T3.
Regarding condition of the movement, sorry to disagree with you Horlogerie but I regard this as a VERY tired movement. I have watches 30 years older than this in much better condition.
I appreciate that your role as a watchmaker is the function – is it running and if not let’s get it running. Any Omega of this age that is running acceptably must have some value – but I’m afraid it’s no more than that.