Submariner ...1680 ,5513 vintage bezel inserts are pretty much expensive and together with the dial they are the face of the watch. Vintage Bezel inserts can be found here on vrm. If your piece is one with plexi glass then Rolex can replace the bezel with a "service" insert the topography of which will be totally different of the insert originally delivered ...which is not a good idea
If your vintage Sub has sapphire glass ie ref 16610 16800 then to replace the insert will be less costy and the appropriate bezel will be easy to find.
Lastly if you post a pic of your watch , who knows , may be you have a nice insert ...small blemishes normal on a vintage watch.