Even a letter won't show that for a 50's gun whether it was an R or an RS. Don't think it was recorded in the ledger anywhere. There were very, very few 50's RS's sold compared to R's.

What would be vintage would be any of the Redfield receiver sights or Lyman receiver sights. Don't think the tang sights were still being sold in the 50's (such as the Lyman 1A or 29 1/2 or Marbles Flexible). Since it was factory d&t, you could pick up a new Williams FP also.

And, yes, the KG stamp on the metal and stocks were to keep them together - everything was hand fit and wouldn't necessarily fit another rifle.

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