Best as I can tell. This is where you sometimes get into what is not a "popular" model relative to say a model 1 or model 3. There were sheaths sitting in there that got pulled out and used, irrespective of who made it.

The model 11 looks mid 50's so I dunno on that one. Could have been in the bin, a replacement I suppose, or a new keeper put on later.

Just an FYI, I know a guy that got a low "S" model 8 out of the shop in the mid-80's. I have seen a low "S" model 3 at the shop that is used as a pattern as recently as a few years ago. So, you gotta consider this isn't always like turning on and off a faucet when are considering what went on at RMK.

Is that stag model 4 a separate "S"??