The 312 was part of a series (310 series) of rifles produced between 1940-1969. The name Benjamin Franklin was a marketing gimmick it had nothing to do with Franklin.
Today Both Benjamin and Sheridan air guns are owned by Crosman air gun company. Crosman offers a free service to locate speciality shops that repair old airguns that are antiques or out of warranty,...
It is a Benjamin Air rifle. Benjamin Franklin is just a quote printed on the side.Mgf 1968-92the age of your model 342 Benjamin air rifle can be found on crosman's website, but I have saved you the...