What kind of fieldphone is that

[Theodor]

I wonder, what kind of fieldphone is that? Wartime or later? Military, Luftschutz, Railway or....?

[rv12p2000]

Hello

fernsig is a company that still exists it is available on the net, Are main activist are secure, (explosion-proof) telephone

probably a phone uses in the mines or explosive atmosphere

What period WW2 ?

Regards RV12p2000

[Funksammler]

Indeed it looks rather industrial to me.

regards,

Funksammler