I saw one on an auction site the other day. When I saw it I remembered this question being asked before. I wondered at the time if there were that many instances of the SS marking or if the same rifle was being discussed at various times. If John says he has seen numerous examples of the marking I'll go with different instances instead of the same rifle.

Thanks John,

Emri

P.S.- SS means "super stock". They were a little raceier than factory stocks!