What is the age of a jc Higgins model 126.19330?

this rifle was made by Crosman for Sears under the JC Higgins brand name. It's really a Crosman model 166. Originally it was the HAHN repeater but Crosman bought out Hahn and continued the model as a model 166 for Crosman 1958-1971.

See the link below for the Owners Manual.