I have a Model 1950, 30-06, in for repair. Proof date a simple '51' and a 4 digit serial number in the 4K range.
Single trigger w/flag and side safetys. Side safety ser#'d to the rifle so I doubt it was an add-on.

It's had both a side mount and a Leupold top mount on it in the past.
I'll ask the owner if he ever used charger clips in it before the 'scopes and what type.