I have a 1976 era Sheridan Bluestreak. It would only hold one pump so I tried to fix her myself with a fixit kit from Pyrimid Air. Alas, I could not put her back together.
My father-in-law gave me his childhood airgun. He said he got it used when he was 10 years old. He is 70 now. So, this is about 60 years and looks it. Quite a bit of patina on this one.