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The “Reverse Dial” has always appeared to be a legacy that a few Telcos had to accommodate when any new equipment was approved and purchased for connection to their networks.

New Zealand and Norway are two countries where the dial numbering (shown in the following pictures) in the decadic systems was (almost) the reverse of nearly every other Western country.






















                        “Conventional Dial”                                                            “Reverse Dial” (NZ, Norway)


The key similarity between New Zealand and Norway’s electromechanical telephone systems installed in the mid-1930’s was their simultaneous use of the ROTARY 7D telephone exchanges.

While the ROTARY 7D system didn’t by itself require a different numbering layout on the dial, it did have some unique features.


In 1928, LM Ericsson acquired a majority interest in the A/S Elektrisk Bureau based in Oslo (Kristiana).


Norwegian Deluxe Telephone Set c1890

Made in late 1890's by Elektrisk Bureau in Kristiana (Olso) Norway. Used Ericsson components