DBJ 18
Called the Ericofon 500 this particular variant was made by L. M. Ericsson for the Dutch PTT.

Ericofon main page

Circuit diagram

The Ericofon was launched by the L M Ericsson Company in 1954 as a convenient, all-in-one telephone.  It was moulded from ABS, which made the telephone light weight.

Multiple designers were involved in the design of the Ericofon. Its early prototypes (1941-1949) were overseen by designers Ralph Lysell, a pioneer of Swedish industrial design and Hugo Bloomberg, the head of the technical department at Ericsson. The Ericofon project was then passed on to Swedish designer Hans Gosta Thames from 1949 to 1954, who took from Lysell and Bloomberg's earlier prototypes to develop a phone that would be "light and feel comfortable in the hand".

Last revised: July 23, 2025