SIEMENS & HALSKE No. 4072

No. 4072
Wall telephone for magneto call similar to No. 4071, but with 1600 ohms bell resistance, for signalling through about 75,000 ohms.

Net weight about 5.33 kgs.

Taken from the Siemens & Halske Telephone Catalogue 1912

Last revised: November 26, 2022

FM2