05937, I believe this indicates the watch was made in May of 1970. I do not believe the bracelet is original due to no logo, but it is from the 1970's. The Bell-Matic has two mainsprings: one for powering the watch and one for ringing the bell.
It has never changed hands and has been carefully worn and well maintained throughout its life. 100% Authentic Bell & Ross. Brown Bell & Ross Leather Strap. Original Bell & Ross Signed Crown. The original Bell & Ross leather strap remains in very good condition with normal signs of use and plenty of life remaining.