What does this text mean??

[Apricus]

I have a French Adrian helmet that has writing on the inside: is this the manufacturer(if so which manufacturer) or something else.
All I can see is:
LM. OL, (I think that's right)
iseille
1938(maybe)

Thank you in advance

[HPL2008]

I think the word in the middle is "MARSEILLE", actually.

[M.E.E.]

It is the manufactures stamp or at least it looks like it.

[Gunny Hartmann]

It's the makers stamp, MA.M.OU from MARSEILLE!...