I am in need of suggestions on a 1963 Heuer Standard model 3336 with valjoux 23 movement I think? I purchased this watch new about 1963 in Zurich.

The watch will run for a few minutes then ceases.
The stop watch function work..I.E. the lapse time in seconds work, as well as the 30 minute lapse time indicator..The sweep hand in 1/5 seconds also function..It will reset properly.

I am interested in knowing were I might have this watch repaired and have the crystal replaced also, since it is crazed..

I have attached a couple of photo links, shows the front and back. Watch has been in my jewerly
box for the past 35-40 years..Somewhere along the line, I was given additional watches.

Any comments about its current worth?? against having it fixed somewhere..suggestions. I like to have it fixed, depending on overall costs.

Thanks for any help in advance..Bob