Here's some info on the knife provided by Mike Hungas @ Ruana:

It’s tough to even put an estimate on refinishing the handle and rest of the knife. It may be around $ 150 or so to do that.

The 39 C was a catalog Bowie up until about the year 2000, however yours was made some time from 1962 – 1983 as indicated by the “M” stamp. We’re not sure how many have been made and it could still be made as a custom order.

Hope this info helps.

Thanks,

Mike