Ring Mounts 5/8" -, VERY RARE!! Vintage Japanese Dovetail Ring Mounts for those thin scope tubes (5/8"). 100% Steel construction. HIGH. Almost imposible to find a similar pair today, unless you wanna go the route of cheapo plastic/aluminum Chinese ones "attached" to low class optics.. Long time ago taken off a Mauser .22 rifle and since then put aside. Superficial signs of rust due to age/storage but other than that in great working order!