I just bought a 1950 rifle in .270,nice clean with a G&H side mount.It had a Weaver 4X,now wears a Leupold 6X42 and all's well.However,looking over the proof date,I discover a complete date of 01.17.50 and it has no side safety? A wing on the bolt only? Is this really that early,that they had not made a side safety yet? The rifle is original,about 85 to 90%...