|Was Telephone No. 370.
This is the first model of Ericsson's most well known telephone. The carbon grain transmitter was introduced in 1888. The AC100 was made from 1884 to 1888 with Ericsson's own "spiral transmitter" (Swedish Information).
In both the 1905, 1911 and 1912 British Ericsson Telephone Catalogue
Last revised: September 30, 2019