Omega Watch Repair - seeking guidance

My step-father recently passed and left me an Omega watch dating back to the 60's (I think). He wore the watch a lot, and was a serving member of the 59 Independent Commando Squadron Royal Engineers, so its been to hell and back. We were very close, so I have no intention of selling it, but I'm looking into having it repaired and cleaned, and possibly adding a strap. It's a very sentimental piece, but I'm also practical, so I want to make sure the investment is warranted.

I know nothing of watches so I'm hoping to get some guidance before I visit a dealer and potentially get ripped off. I'm looking to get an idea of current/expected value, if the repair investment is worth it, what to expect when I visit the dealer, how to protect myself/watch, and any questions I should be asking when I visit. I'm sure you can write a book with the answers but any help would be greatly appreciated.

Here's what I know about the watch along with some pictures:
- Omega Seamaster 300 Automatic
- Military Case Back
- Sword hands
- Large triangle
- 1966-1967

Cheers

It needs a new crystal and a service. That's it. Depending where you live, I'm sure the experts will tell you where to have it serviced. It's a very cool watch. Hope there's not too much rust inside.

Depending where you live. The first thing you have to do is to find a reputable vintage watch repair place that is capable of finding parts for this watch. It is a beautiful piece and it will need some much needed care and repair. You don't want to go to a place that is just going to take advantage of you.

In perfect condition with Provenance from the Factory as a military Seamaster 300 : value at big Auction houses around Pounds 30.000. You need an experienced Watchmaker with Parts access. The rust on the dial is not very promising....Will continue at the back of the dial and into the winding/setting section. So, parts will be needed. All easy to obtain. If the rest of the movement is rusted as well, ask to find a complete replacement movement and change the bridge with your movement number, which gives you the information as a military Seamaster. So far no big problem. New correct crystal. New screw in crown with a good seal and a new back seal, if you want to wear it. Then you need a good Dial re Lume person, not to replace anything, but to clean the rust very careful and leave the Lume as is. And stabilize the Lume on the hands from the back of the hands. Leave the existing Lume there as well. Then you will have a very reliable tool watch . I have an incling , that the future value makes you uncomfortable to wear it. Just do it. Nobody will want to rob you, looks too strange and used...No bling. And that's how we like it.n

Simon Freese is the gold standard watchmaker for vintage Omega in the UK