BELL TELEPHONE MANUFACTURING Co.
(BTMC) ANTWERP
Telephone No. 2255

Metallic microtelephone set for local and intercity communications, combining all the components of a network device in a minimal size.

2255A - Parallel connection.
2255B - Series connection.

Portable Microtelephone Set
for local networks and intercity lines
(magneto calling and local battery)
No. 22255

22255A
Portable Mobile Microtelephone set for Parallel Connection comprising a Telephone No. 2255A.

Including a polarised ringer No. 2011B, (1000ohm resistance), magneto generator with 4 magnets (PS 2784A), induction coil No. 2215A, plunger switch No. 2022, protector No. 2010, Microtelephone No. 2258A with green silk cord No. 2064B, containing 4 conductors, connection rosette No. 2007 with green silk cord 1.5m long No. 2069A containing 6 conductors.

Dimensions: 300 x 170 x 145mm.


22255B
Portable Microtelephone set for Series Connection comprising a Telephone No. 2255B.

Including a polarised ringer No. 2011A, (120ohm resistance), magnetic generator with 4 magnets (PS 1784A), induction coil No. 2215A, plunger switch No. 2022, protector No. 2010, Microtelephone No. 2258A with green silk cord No. 2064B with 4 conductors, connection rosette No. 2007 with 1.5m long green silk cord No. 2069 containing six conductors.

Dimensions: 300 x 170 x 145mm.

Taken from the 1910 BTMC Catalogue