60s model Bears will have the year of production as the first number of the serial. i.e. 8R1234 would be 68. A serial starting with a K is probably an early 70s model. Good luck with the arrows. If you get it dialed in that old bow will still be deadly.

They say everything happens for a reason.
For me that reason is usually because I've made some bad decisions that I need to pay for.