Rough guide to the US M-1 liner & makers

[Walkwolf]

Great guide. Very helpful, Nick !

Screaming Eagle - all the manufacturers stamped the liners
on the inside, at the center of the crown........

[Screaming Eagle]

Yeah, I noticed that upon further inspection of my M1-C. Thanks for the help.

[NickD]

here's a basic over view of liners starting from WW2 to the late 1960's

1) Early Fiber liner these were the first type of liner made for the M-1


2) Low Pressure liner


3) High pressure liner


4) 1950's (Korean War liner)


5) Early 1960's liner Note the absence of the insignia grommet hole to the front


6) Mid 1960,s liner with improved suspension


7) late 1960's liner now being made from nylon


Fiber liner construction:
These were made from a pressed fiber sheet formed into the shape then then painted green on the inside before being covered with a thin fabric.

Low pressure liner construction:
The St. Clair Rubber Company and Hood Rubber Company developed liners that allowed for quicker or cheaper production and distribution. The “St. Clair” was a low-pressure plastic liner that used short steam pressure to mold the duck cloth and provided a means for a much quicker production. The St. Clair liners are easily identified by their shiny plastic appearance and indented sides. The low-pressure technique used by the St. Clair firm did not perform as well as the high-pressure models, and their contract ended in early 1944.

High pressure liner construction:
The high-pressure technique basically included the following steps (which varied depending on manufacturer)
1. Duck cloth saturated in plastic resin.
2. Duck cloth cut into strips and made into pattern.
3. Pattern placed in hydraulic press mold and formed to shape.
4. Excess rough edge trimmed off and rivet holes punched.
5. Suspension system and chinstrap studs riveted in place.
6. Painted olive drab and baked dry.

[NickD]

If you're looking for the makers stamp here's a pic of were it can be found.

[ppsh33]

hi nick ,thanks for taking the time to compile this info , very interesting and has made me a convert to the us helmet ......cheers paul

[NickD]

glad ya found it helpful

[vicka1971]

Hello everyone

My name is Vitalis. I am new guy in this forum. Guys ,my friend got this M1 helmet in France. Accourdig sellier this was WW2 US marines on D-day.I have never see this type of helmet before( specialy with ancor). The numbers on metal part of potis: 6570,on plastic liner: 26 MSA. Thank you for your help.

Here is few photos

[stuka f]

Great job!
Thanks.
|<

[Walkwolf]

[QUOTE=vicka1971;311144]Hello everyone

My name is Vitalis. I am new guy in this forum. Guys ,my friend got this M1 helmet in France. Accourdig sellier this was WW2 US marines on D-day.I have never see this type of helmet before( specialy with ancor). The numbers on metal part of potis: 6570,on plastic liner: 26 MSA. Thank you for your help.

QUOTE]

Could be possible, but I think this is simply a personalised US Navy helmet.
The US Marines have an 'EGA' ( Eagle, Globe, Anchor ) logo.

There were US Marines present at D-Day in Normandy, but apparently
there were very few ashore. I do not know where
or when they landed...............

[gbalke]

Great resource Nick, thanks for your time.

Can you tell us in the case of Capac liners the significance of the single digit near the Capac cross? One of my Capac liners has the numeral 6 (or is it a 9)?