I think in the 50's rifles were stamped on the front of the receiver with their model designation. So, the F would stand to reason it's a 50's model F. But, I think that the model R's of that time period were stamped with an "8". Yours has an 8 and an F. The F was a feather weight with the butt hollowed out and a slimmed down forearm, The R was the opposite, the heavy weight rifle. There was an F in the 20's that was a take down, different rifle. Some one will come along and unconfuse me.
