The Series A stamp shows up on different models. It is something about the action revision I believe. Never heard a good answer to it.
I have seen several guns from early '80s I believe that look like Fs but are not marked such. I think that's when they were using up any and all parts they could find.
The SERIES A stamp means there was a change to the rifle model, possibly just a cosmetic change (according to Callahan). I think almost all Savage 99 models got stamped with it by the end of the 70’s.
There were a group of 358’s that show up around 1974 that look like a late 99F, but no model letter on them. They are also stamped SERIES A. With no 99F stamp and no 99F’s catalogued in 1974, and it’d been a while since the 358 was offered, these were probably a special run for a store. Quite likely using up unused 99F parts.
