My 55, and 72, Bluestreaks.Tim McMurray changed my 72's rear sight, from an earlier model Sheridan, so the sight doesn't match the year 72.The 55 has an aftermarket hand pump guard on it that doesn't match year 55.The sftermarket handguards, come from Keith Urquart, in Anna Tx.
Here's a Crosman 782 Black Diamond from April of '92 and 1982 Daisy 880