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2250A
Microtelephone with ebonite handle, with circuit breaker
for the transmitter, consisting of a Delville transmitter, a
receiver with three magnets (120 ohm resistance), transmitter and
receiver in a nickel-plated metal box, and a four-conductor green
cord.
2250B
The same Microtelephone but with a parallel
suspension ring.
2250C
The new Microtelephone but with an
angular suspension ring.
21820
Operator station (for
Standard A switch with local battery) consists of a microtelephone
No. 2250C, Delville transmitter.
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2251
A Microtelephone with ebonite handle, consisting of a Delville
transmitter, a receiver with three magnets (120 ohm resistance),
transmitter and receiver in a nickel-plated metal box, and a
four-conductor green cord.
2251B
The same Microtelephone with
a parallel suspension ring.
2251C
The same Microtelephone but
with an angular suspension ring.
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2252A
Microtelephone with a carved ebonite handle and a circuit
breaker for the transmitter, consisting of a Delville transmitter, a
receiver with 3 magnets (120 ohm resistance), transmitter and
receiver in a nickel-plated metal box, and a 4-conductor green cord.
2252B
The same Microtelephone but with a parallel suspension
ring.
2252C
The same Microtelephone but with an angular
suspension ring.
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2253A
Microtelephone with ebonite handle, Solid Back transmitter,
receiver with 3 magnets (120 ohm resistance), transmitter and
receiver in a nickel-plated metal box, green silk cord with 4
conductors.
2253B
The same Microtelephone but with a
parallel suspension ring.
2253C
The same Microtelephone
but with an angular suspension ring.
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2256A
Microtelephone with ebonite handle, circuit breaker with
double electrical contact controlled by the handle lever, leaving
the receiver and transmitter out of circuit when the lever is not
lowered.
Composed of a Delville transmitter, a receiver with 3 magnets (120
ohm resistance), transmitter and receiver in nickel-plated metal,
and a green silk cord with 4 conductors.
2256B
The same
Microtelephone but with a parallel suspension ring.
2256C
The same Microtelephone but with an angular suspension
ring.
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2258A
Microtelephone with an ebonite handle, composed of a
multi-cell transmitter with fine granules, a receiver with 3 magnets
(resistance 120 ohms), transmitter and receiver in a nickel-plated
metal box, and a 4-conductor green sole cord.
2258B
The same
Microtelephone but with a parallel suspension ring.
2258C
The
same Microtelephone but with an angular suspension ring.
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2259
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2262
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2262A
2262C
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2264
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2266
Hygienic handset with capsule transmitter insert. CB and
Automatic working.
Dimensions: 245mm x 70mm.
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2268
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2271
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2273
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2276
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2280
Hygienic handset for tropical climates with capsule transmitter
insert. CB and Automatic working.
Dimensions: 245mm x
70mm.
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2281
Hygienic handset for humid climates with capsule transmitter insert.
CB and Automatic working.
Dimensions: 245mm x 70mm.
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2282
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2288
Handset for use in moderate climates.
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2289
Same as the 2288 but for tropical climates.
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2290A
Handset made of Bakelite. The transmitter and receiver are of
the capsule type. For use in all climates.
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2715
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2815
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BELL
TELEPHONE MANUFACTURING Co.