Can Anyone ID These Markings

[T. Steiner]

Hello, I have a late war, no decal M42 helmet with some odd markings. Looks like ADMIS over CRB inked on the inside of the liner. Anyone have any thoughts. I hope the pictures will help. Many thanks....Tom Steiner

[T. Steiner]

number 2

[Larry deZeng]

I have a sneaking suspicion that those abbreviations are NOT of German origin. I have a dictionary - several, actually - of many thousands of German WW II military abbreviations and I found none that come even close.

--Larry

[Johnny R]

Helmet

I would post the lid on the helmet section, those guys will know. This liner looks almost new and unissued to me?