1927 - Magneto set for alternator ringing
This set, that has been used in Aalborg, is a part of a system using so-called alternator ringing.
The alternator ringing system was mainly used by larger companies with many extension telephones connected to a switchboard. When pushing the red button the alternator sends out the alternating ringing current that you normally had to generate yourselves by turning the crank.
This type of telephone that never was spread widely, is manufactured in Horsens by Kristian Kirks Telefonfabrikker and was still in use in the beginning of the seventies.
Post & Tele Museum - Koebmagergade 37 - Postbox 2053 - DK 1012 Copenhagen
Tel. (+45) 33 41 09 00 - email:email@example.com