Just adding to the thread... in case it helps somebody else.
I have what I think (from info here) is a 1948 99R in .300 Savage. SN #5037xx, no LBC; instead, a stamped "3" or maybe part of an "8" so perhaps just an inspectors mark. Brass rotor. 24" barrel. Round forend, not particularly wide, not a Schnabel. Steel buttplate.
Came to me with 3 sets of sight. Bead up front with two folding leaves ear the rear of the barrel. A folding tang sight, works with front bead. And a Griffin & Howe removable scope sight (plate attached to the left side of the receiver) with a Weaver K2.5 inserted. (G&H told me the way they installed the scope in their earlier one-piece rings was to dismantle it, slip the rear sing on, re-mantle (?) the scope.)
I don't know the difference between the R or RS models, or whether those two models were built concurrently or not... so I've assumed R is correct.
