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.
Hey Rory, where did you get that information? I never seen confirmation one way or the other from JTC on whether RS where actually recorded post war. Also, never heard that RS did not sell well in the 50s? It certainly seems likely as there was not much difference in my opinion... you were getting a tang sight but no rear sight for the extra $$$... on a gun that was drilled for a scope... seems odd that too many would pay for the RS but never seen anything that actually showed the sales amounts.
Thanks
