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MB 100
Portable Telephones
 This instrument consists of a polished oak case, with carrying handle, containing Generator (3 Magnet), Magneto Bell (200
ohm.), Micro-telephone No. RE 3022, with Waterproof Cord and Celluloid Mouthpiece, 2 Dry Cells, Lightning Arrester and Terminals
for line and earth.
Weight, complete with Cells 16 lbs.
Originally numbered as the No. 390.
Types MB 100 - 125
Portable Telephone Instruments
This instrument consists of:-
A polished oak case with carrying handle, containing generator, magneto bell,
micro-telephone with waterproof cord, and india-rubber mouthpiece with metal
mountings (can he supplied with a celluloid mouthpiece if desired), 2 dry cells
type RE. 190 (Old Catalogue No. 600), lighting arrester, and terminals for line
and earth.
If specially ordered, the instrument can he supplied with a canvas cover.
| Type |
Type of generator |
No. of Gen magnets |
Handset |
Type of cord |
Bell Resistance |
Dimensions ins |
Weight |
| MB 100 |
RH 3120 |
3 |
RE 3022 |
RS 7000 |
200 |
12 x 6.7 x 8.25 |
16.75 |
| MB 110 |
RH 4100 |
4 |
RE 3022 |
RS 7000 |
200 |
12 x 6.7 x 8.25 |
17.5 |
| MB 115 |
RH 4200 |
4 |
RE 3042 |
RS 8000 |
1000 |
12 x 6.7 x 8.25 |
17.5 |
| MB 120 |
RH 5100 |
5 |
RE 3022 |
RS 7000 |
200 |
12.5 x 8.25 x 9.45 |
23.5 |
| MB 125 |
RH 5220 |
5 |
RE 4042 |
RS 8000 |
1000 |
12.5 x 8.25 x 9.45 |
23.5 |
Taken from the Ericsson Telephone Catalogue 1911
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