Strictly speaking this is a generic name for phones from the Beeston factory in Britain. In Australia it designates one model of wall phone, the N2500, known in Australia as the Type 35MW, which was produced in large numbers for the Australian PMG and other worldwide users. The name also covers the many models and modifications derived from it. It is also known in New Zealand as the Box Ericsson. It was simply constructed and finished, reflecting its mass-produced nature and changing styles. An Ericsson catalogue sets its place in the market by stating These instruments, although cheaper and not so elaborate ... as the AB230 or AB535 types, are thoroughly reliable and efficient in service. The numbers that survive are proof of this.
The case is a plain box, 240mmm X 400mm X 150mm deep.
Terminals and wiring are concealed. Bells are mounted at the top of the front
panel, and a writing slope at the bottom. Timber is matt polished oak
or (in the last models) dark varnish over oak. The phone was supposedly put into
service in Australia in 1916. A later date is more likely, as it was in the middle
of World War One, and Britain would hardly have resources to spare.
The original Swedish Model AB232 was fitted with a handset, but British models
had a separate transmitter and receiver. This was unusual for Ericssons, who had
been using handsets since 1892. It was made necessary by the British National
Telephone Company, who used Western Electric switchboards. Their Chief Engineer
maintained that the Ericsson phones did not work correctly with the WE boards.
Ericssons then produced a solid-back transmitter to replace the handset, and this
necessitated the separate receiver as well. On later Australian Post Office conversions,
a bakelite handset was fitted on a modified switchhook. The transmitter holes
were covered with a How to Use notice. Some of the last phones have
a circular wooden plug above the writing slope, filling a hole for a dial. Few
were actualy converted to dial operation in Australia. The receivers were finished
in copper bronze, which appears to be oxidised brass, but later renovations
used black enamel. The other metalwork was also copper bronze. Earlier models
may still be found with the remains of an Ericsson-England transfer
on the front, but this was vulnerable to wear. The later refurbished models may
have a brass PMG plaque or transfer. A similar phone has been noted from Sterling
in the UK. Its main difference is in the shape of the corners, and its electrical
fittings. The door has more squared-off corners than the Ericsson, and the sides
are 118mm deep against the Ericssons 113mm. The generator is a 3-magnet
model with cast end plates. For further details, see ATCS Newsletter January 1998.
Once the Beeston factory began producing its own models, the Swedish
AB model numbers were replaced by a new N series.
For a comprehensive range of the British phones, including those used in ex-British colonies, I recommend Bob Freshwater's site at http://web.ukonline.co.uk/freshwater/