Ubicación virtual: Telephony

Usually used in long distance calls where the green lever was to start the count and the red one to stop it.

Wood and metal device with magnet and crank. Separate audio and voice system. Front bells, shelf for messages and cavity for batteries. Line cable connectors.

Metal and bakelite piece with connection terminals

Intercom device

Metal device with integrated handset hook. Fabric cord.

Wooden body with magnet and crank. Front bells, audio system and separate voice. Message shelf, fabric cable.

Metal device with separate transmission and reception system. Adjacent box including magnet crank and bells.

Apparatus with cast metal base and fluted shaft. Separate transmission and reception system. Fabric cord.

Integrated handset (voice and audio), fabric cable and grommet to hang on a wall phone.

Circular device made of wood and metal in the shape of a donut with a separate audio and voice system. Fabric cord.