What do I have? - new photos added

My father passed away recently and I found an old Omega watch that was given to him by the wife of one of his best friends when the friend passed away in the late 60's. I estimate that the watch is from the late 40's to early 50's based upon knowing the people involved, military service, graduation from college, etc.

The watch appears to be stainless steel and the hands all move appropriately when using the winding stem to set the time. The movement does not work and it feels like the springs are wound to max capacity. I estimate the watch to have been sitting in a box or drawer for the past 45 to 50 years.

Does this have any value, and is it worth exploring having the watch sent in to be repaired. The watch doesn't have any real sentimental value to me or my siblings as it was not my fathers watch, although it did have sentimental value to him. Photos are below:

Hello! If you want correct information you need to open the watch and look inside (movement and internal caseback) 😉

Agree it looks like ref 2300 but there appears some differences ( See photo) IMO depending if bracket is original £400. The one below ( no strap) went for £350 I believe.

OK - I'll get the back off the case today and post pictures. Thanks for this information so far.

Ok - photos of the case interior and the movement are below. As I said, the watch doesn't currently run and there was a significant amount of varnish or dried oil on the caseback threads so I assume the entire movement is similarly gummed up. My primary question is if it is worth it to attempt to have the movement repaired and if the repair will cost more than the value of the watch. My last submariner service cost more that $500.00 and I doubt this watch is worth that, but I really have no idea of its worth.

Thanks in advance for your opinions, they are appreciated.