DEK 1201 (replaces the BC 2055)
This device has a small cover made of black Bakelite and fitted with signal press button. On an incoming call the handset is lifted from the main device, whereby voice connection is obtained.  The main device is called when the handset is lifted off, whereby the corresponding button on the main device falls. Then the extension device's signal button is pressed and rings main telephones bell.

Parts:
Microphone RLF 1012 made of black Bakelite with microphone capsule RLA 1004, 40ohms and cord TRS 1302, 1250mm.
Direct current ringer KLD 1002, 40ohms.
Line cord TRS 1503, 1250mm.
Wall bracket NEF 1005.

Dimensions:
Height 118mm, width 233mm, depth 152mm.

Weight 1.6 kg.

Taken from the L. M. Ericsson Catalogue No. 610 (1939) - Swedish Translation
 

Last revised: March 23, 2024