DBK 1001, DBK 1002, DBK 1003 and DBK 1051
These have Bakelite covers of the small type have built-in buzzers as signalling devices and are particularly suitable for offices and other places, where strong, disturbing signals are not desirable.  In the case of automation, the devices are easily changed by replacing the central cover plate with a dial.  The inner parts are assembled on the bottom plate and easily accessible for adjustment.

The model DBK 1051 includes a jack plug, but not a wall mount with jack, which can be separated.

Appropriate wall mounts with jack are:
For surface mounting NEG 1001.
For recessed mounting NEG 2001.
By means of a shelf DYY 1011, the devices can be mounted on wall.

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

Weight 1.7 kg.

Colours:
DBK 1001 - black
DBK 1002 - mahogany
DBK 1003 - ivory white
DBK 1051 - black

The DBK 1001 supersedes the CG 552.

Wiring diagrams -209423, 209435 and 209447.

Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 610 (1939) - Swedish translation

DBK 1001 internal view

Last revised: June 08, 2024