Need help identifiying vietnam era M1 helmet with odd chinstrap markings

[11thArmoredThunderbolts]

Hello, I have been collecting m1 helmets for quite a while now and know a little about them but this helmet has me a little confused. The shell appears to be ww2 McCord made (heat stamp # "1159J", late 1944?) which was repainted for Vietnam but the chinstrap clips have a circle stamp on them which I have not seen before. The buckle for the strap does not have an anchor but the black clips do have that circle stamp where an anchor would normally be. I originally thought it was American but maybe not... After searching around, I found a similar symbol on a few Australian made M1's but those had a circle with a dot. Has anyone seen this circle before or know what it means. Thanks!

[JPhilip]

Hello,
As your thread was posted in the wrong forum dedicated to WWII german helmets, i moved it to this one : US M1 steel helmet forum
Maybe you'll get more infos over here
Thanks

[Tank Destroyer]

Anyone recognise these markings, T1 chinstrap - STEEL AND KEVLAR HELMETS - U.S. Militaria Forum

The same question was asked recently on another forum and without a clear answer. The circle in one of the pictures shows it on a green clip. I believe they’re US but could not tell you who’s the manufacturer. I would like to see the whole strap, it may be my eyes but they look odd.

Marty

[11thArmoredThunderbolts]

Thanks for the forum link Marty. Here are some chinstrap pictures

[Tank Destroyer]

Straps are good.

Marty

[Jimir]

Hi
I started a similar posting in relation to the same thing on another forum, here’s the link:

Anyone recognise these markings, T1 chinstrap - STEEL AND KEVLAR HELMETS - U.S. Militaria Forum