P proofmark on top of the slide, in front of the rear sight.

Lookup

HS marked barrel. HS is the marking of High Standard.

'G' marked tow on the General Shaver contract magazine. These magazines are recognized by the G mark on the toe and the spot welded seam up the back of the magazine.

Remington Rand 1911a1 Serial Number Lookup Reverse

Markings inside the front channel of the frame.

Remington Rand 1911a1 Serial Number Lookup

Inside of grips.