British Mk II Helmet with red square... any idea?

[Jean Loup]

Hello.

this is my first british helmet.

We can see 2 red square (or diamond?) on the top and front of it.
Does anyone have a idea about the meaning of these square?







thank you for your help

Jean Loup, from France

[tinlid]

Being black a home front helmet, but can't help with the red. Any pictures of the inside, dates/makers names?
Aaron

[Jean Loup]

Hello

Thank you for your interest

Some inside pics:








It's a Ro&Co / FFL from 1943.

Jean Loup