BELL TELEPHONE MANUFACTURING Co.
(BTMC) ANTWERP
Telephone No's 2724, 2725, 2874 and 2875

Central Battery Subscriber Lines
"BAKELITE" Series

The streamlining of our manufacturing processes has allowed us to produce a new series of subscriber lines offering numerous improvements and advantages in every respect compared to previous subscriber lines.

Interchangeability of parts between tabletop and wall-mounted lines.

With the exception of the dial or the dummy dial, all equipment parts, as well as the switch hook, are mounted on the base plate, which can be used interchangeably with the cabinets of either tabletop or wall-mounted lines.

Accessibility of all parts, ease of maintenance, and the possibility for telephone companies to reduce their inventory.

Aesthetic design of the line and handset.

Dial No. 7017A has two off normal contacts, whilst Dial No. 7019A has one off normal contact. Any of these dials can be fitted to these telephones.

All these telephones are fitted with the Handset No. 2290A.

Sets for Moderate Climates

Tabletop Sets

No. 2724A
This is a standard telephone comprising of a Bakelite casing, one-piece construction including the base and cradle; removable steel base plate on which all the components are mounted (capacitor, induction coil, polarized bell, bells, switch hook). Also includes rubber feet and a Bakelite plunger.

No. 2724B
This telephone is similar to the No. 2724A, but is equipped with a push button on the casing which, via a contact spring mechanism, provides the telephone with earth recall facilities. Used with automatic switches No's 7006, 7011, 7025 and 7035.

The press button is located above the top of the dial.

No. 2724E
This telephone is similar to the No. 2724A, but it can be used as a standard extension or as a shared line extension for two subscribers (a single line extension for two subscribers) by modifying the circuit to provide for earth ringing.

Automatic Service
These telephones are equipped with a No. 7019A dial containing the numbered 7002A disc and the instruction card 7003A.

Manual Service
These telephones are equipped with a No. 2047C dummy dial plate.

Wall-Mounted Telephones

No. 2725A
These comprise of a Bakelite case, supplied as a single piece with the base and cradle, removable steel base plate on which all the telephone components are mounted (capacitor, induction coil, polarized ring, bells, switch hook). The set has a Bakelite plunger and a case mounted dial.

No. 2725B
This telephone is similar to telephone No. 2725A, but is equipped with a press button mounted on the front of the case providing the same features as telephone No. 2724B.

No. 2725E
This telephone is similar to telephone No. 2725E and can be used as a standard telephone or as a shared telephone line for two subscribers by modifying its circuit.

No. 2725F (1952 catalogue)
This telephone is similar to telephone No. 2725A, but is used by train despatchers.

Automatic service
These telephones are equipped with a No. 7019A dial containing the numbered disc No. 7002A and the instruction card No. 7003D.

Manual service
These telephones are equipped with a dummy dial plate No. 2047C.

Circuits
The circuits of the Type No. 2725 telephone are the same as those of the Type No. 2724.

These stations are generally used with private automatic switches (Type 7006 - 7011 - 7025 - 7035).

Stations for Tropical Climates

All parts, equipment, and accessories of these stations are specially treated to withstand the atmospheric conditions of tropical countries (see summary table). Brass base plate, black finish.

Tabletop Telephones

No. 2824A
This telephone is of similar construction to telephone No. 2724A, but its circuit is similar to that of telephone No. 2724E.

No. 2824B
This telephone is similar to telephone No. 2724B.

No. 2824E (1952 Catagloue)
This telephone is similar to telephone No. 2724E.

Wall-mounted telephones

No. 2825A
This telephone of similar construction to telephone No. 2725A, but its circuit is similar to that of telephone No. 2724E.

No. 2825B
This telephone is similar to telephone No. 2724B.

Telephones for climates of high humidity

All parts, equipment, accessories, and dial are specially treated to withstand the extreme atmospheric conditions of tropical countries.

Tabletop Telephones

No. 2824ATR
This telephone is similar to telephone No. 2724A.

No. 2824BTR
This telephone is similar to telephone No. 2724B.

No. 2824ETR (1952 Catalogue)
This telephone is similar to telephone No. 2724E.

Wall-Mounted Telephones

No. 2825ATR
This telephone is similar to the No. 2825A.

No. 2825BTR
This telephone is similar to telephone No. 2725B.

Automatic Service
These telephone are equipped with a No. 7019ATR dial.

Telephone Colours
All these extensions can be delivered in one of the following colors, to be specified when ordering:-
1 - Cream
4 - Walnut
7 - Brown
2 - White
5 - Light Mahogany
8 - Red
3 - Oak
6 - Dark Mahogany
9 - Dark Red
10 - Brown
11 - Light Blue
12 - Dark Blue

Taken from the BTMC Catalogue - 1936 and 1952

Click here for more information on these telephones

Click here for diagram and detail cards - No. 2724, 2824 and No. 2825

Pictures