I believe this is a Sheridan Blue Streak, pre "Benjamin/Crossman" days. Serial number is 53403 which I believe puts it at 1973 (please correct me if I'm wrong). Pumped it up to around 8, no leaks .Strong valve release and pop but I don't have any pellets to test it out. Overall in excellent condition but with what looks like water damage to the buttstock. Other than that, the only ding is on the left side (pictured). Finish is outstanding, comes with weaver 4x that I believe came with it but its in fair shape, not good. Sheridan intermount. Any questions or additions please let me know! Asking $100 + actual shipping.