Wall Mounted Telephone Apparatus
Emil Mollers – Horsens
Combined Wall Mounted Telephone with Voltage Surge Protector
"Emil Mollers — Horsens". Denmark. 1905
This phone had a magneto handle and a battery inside.
The handset had a carbon powder microphone and electromagnetic telephone on a lever spring holder. LB system device. Used as an intercom in city and rural communications throughout Europe in the early 20th century.