Can anyone ID these markings on an Underwood?

[LimeyCarbineLover]

Does it have a stamp with "Not English Make"...on it like many suplus lend lease US origin weapons denoting non standard ammo size on it anywhere....

As a sidenote the Royal Ulster Constabulary (RUC) Northern Ireland Police forces had M1 carbines in the inventory way into the 1980s.

Regards

Lloyd

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[Johnny Peppers]

Does it have a stamp with "Not English Make"...on it like many suplus lend lease US origin weapons denoting non standard ammo size on it anywhere....

Regards

Lloyd

The NOT ENGLISH MAKE requirement was dropped with the 1955 Proof Law. At the same time the the crown over a circle NP Birmingham nitro proof was changed to the crown over BNP, and the caliber, case length, and proof charge were required.
This is a Colt 1911A1 with the post 1954 Birmingham proofs showing the caliber, case length, and proof charge along with the Crown/BNP proofs. The proof charge is shown as 7 TONS PER SQUARE (symbol for square) INCH (symbol for inch).