What year was a jc Higgins model 58323 made?
I can't cross-reference this to a particular model, but it was
made by High Standard. High Standard was established in 1926 and
Sears Roebuck dropped the Higgins line of sporting goods in 1961.
That narrows it down to a 35 year period. That model was late
enough that it probably had an assembly date code on the barrel
just forward of the reciever.
http://www.histandard.info/datapublic/serial/HIGH%20STANDARD%20DATE%20CODE.pdf