Hi Veez and welcome!
A very nice watch indeed, should clean up nicely.
I'm afraid most here would advise against having the factory do the work as they will probably make wholesale changes that are more concerned with restoring to new condition as opposed to preserving the old and highly-collectable features.
I agree with Spy but I feel $1000 US may be the low-end.
As we are a Collector's forum, most here would recommend a
sympathetic servicing that preserves the old dial, case and hands and only maintains the mechanics and puts a new Omega crystal on it.
My 145.020 was in similar condition as yours and it cost me $550 to have this done a couple years ago by an independant.
Mine as it is now:
View attachment 364868
As for value, they sell for $2-3K US.
Click to expand...