paulfish4570
Veteran
if the jupiter 8, an NOS with painted numbers, or an older one with engraved numbers? if the industar, a zebra, chrome or black? aren't all 61s engraved?
if the jupiter 8, an NOS with painted numbers, or an older one with engraved numbers? if the industar, a zebra, chrome or black? aren't all 61s engraved?

The look is very different. If it has a tab, it is a 1950s lens and is non-rotating. The 1960s Aluminum lenses are also non-rotating, with the change-over at about 1969~1970 from examples that I have seen.
Easy way to tell: the rotating type has Two sets of F-stop numbers on it. The black lenses are all the rotating type.