Genuine German Field Phone, eady for use in your collection or as part of a custom electronics experiment. This KWF Field Phone was used for making both clear and encrypted communications (actual encryption was handled by a central exchange) between 2 German field stations. Dial is the old school rotary kind, and signal was designed to go over a standard 2-wire analog network. Phone is built into a super-tough polymer carry case for knock-proof transport between positions. No guarantees on if this device actually works, but it could be the beginning of a fun and rewarding project.
A fascinating collectible. Nab yours while our supply holds out!