Hi, New member, and as luck would have it, I'm cleaning up a sheridan blue streak (c model ?),Early 70's. . . Serial # 022911 . Aside from that I hope there's lots of interest here about air guns... with laws getting stricter and places to practice marksmanship fewer, these weapons are making more and more sense. Hope others will join in and share makes and brands, upgrades,repairs and info. Thanks guys