Punch mark before serial number

[Jon Field]

What does a punch mark at the beginning of the serial number mean? I know I've seen it discussed before, but do to being close to retirement, can't remember!

Thanks,

[John Beard]

In most cases, a punch mark in front of a serial number is a reasonable indication of USMC issuance. In a few cases, it may mean that an enterprising nefarious Bubba had a hammer, a punch, and a few extra minutes.

Hope this helps.

J.B.

[Jon Field]

Thanks John, it is an old mark obviously been there a long time.

Thanks again

[Crashyoung]

I suffer from CRS, but, didn't they do punch marks on early
receivers to test for brittleness?

[John Beard]

I suffer from CRS, but, didn't they do punch marks on early
receivers to test for brittleness?

Not that I am aware of.

J.B.

[Bob S]

John,

Have you (or anyone else) discovered why the Marine Corps may have put that punch mark there? (inquiring minds need to know )

Resp'y,
Bob S.

[1972Doug]

If memory serves me right, the punch mark meant it had been rebarreled.

1972Doug USMC 1961-66

[John Beard]

If memory serves me right, the punch mark meant it had been rebarreled.

1972Doug USMC 1961-66

Your memory does not serve you right.

J.B.

[John Beard]

John,

Have you (or anyone else) discovered why the Marine Corps may have put that punch mark there? (inquiring minds need to know )

Resp'y,
Bob S.

Check your PM.

J.B.

[Jon Field]

The serial number and barrel date match for 1934. I too would like to know the reason for the mark!