Gas mask named

[RED LION]

got this gasmask yesterday in a lot with other stuff and see that it
is named to KAFITZ it is a number on mask possible feldpostnummer?
THANKS FOR ALL INFO ON IT .

[RED LION]

gasmask dated 1939
gasmask tornister dated 1940
a early set found in a small village near the border LUXEMBOURG-GERMANY

[anmarlodz]

No FP number I could find. Have no idea what it refers to.