TELEPHONE No. HD 500
Ships’ telephone for one line
The receiver of the microtelephone is loudspeaking. This telephone is de signed for mounting in well sheltered places, as for instance the engineer’s cabin. Calls can be made to one number only but calls can be received from all telephones of the installation.
Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 188 (1934)
Last revised: October 11, 2019