What year was the Benjamin Sherdian model 392 PA 22 cal made?

These are the dates for the various models of the Benjamin 392:

Model # and Date as follows.

392: New starting 1992 - still in production.

S392: 1992 - 1998

AS392T: 2004 - 2007

G392: 1991 - 1998

CS932: 1991 - 1994

See the link for more information on dates. You may have to go to the bottom of the list to find your 392,

BTW Crosman owns both Benjamin and Sheridan brand of airguns.