SIEMENS & HALSKE No. 4057

No. 4057
Back-board with battery box polished walnut, suitable for telephones Nos. 4051 - 4054 with accommodation for 2 dry cells type T2 (or 2 storable dry-cells type LT2) or 1 sack element type B2.  Picture below shows a Telephone No. 4063 fitted.

For a taller backboard go to No. 4058.

Net weight (excl. telephone and cells) about 2.5 kgs.

Taken from the Siemens & Halske Telephone Catalogue 1912

Last revised: May 05, 2023

FM2