TELEPHONE No. 300
COMPARISON CHART

History, Technical and General Information on 300 type telephones

Collectors information

Labels that fit in the sliding tray

How to restore Bakelite

Keys for use in 300 type Wall and Table Telephones

The following list details the different 300-type telephone instruments
and their intended uses

Telephone No. 306        CB/auto instrument fitted with trembler (DC) bell, extra switch hook contacts and positions for up to three switches for use on various extension plan systems.

Telephone No. 308        As Telephone No. 306 but with standard magneto bell fitted.

Telephone No. 310        This CB/auto instrument was fitted with a 'Call Exchange' button and designed to work with Bellset No. 41 on shared service lines. Superseded by Telephone No. 312.

Telephone No. 311       Wall mounted CB/auto instrument fitted with 'Call Exchange' button for use on shared-service lines.

Telephone No. 312       Self-contained CB/auto table instrument fitted with 'Call Exchange' button for use on shared-service lines.

Telephone No. 314       As Tele. 312 but with two extra switch positions for extension plan working.

Telephone No. 321       Wall mounted CB/auto instrument with three switch positions for S/S and extension plan working.

Telephone No. 326       As Telephone No. 306 but without extra switch hook contacts.

Telephone No. 327       Newer design wall instrument with three switch positions and trembler bell for extension plan working.

Telephone No. 328       CB/auto instrument with three switch positions for extension plan working.

Telephone No. 329       Wall mounted version of Telephone No. 328

Telephone No. 330       CB/auto instrument fitted with one switch for use on extension plans or PABX with operator recall.

Telephone No. 331       Wall mounted version of Telephone No. 330.

Telephone No. 332       Standard CB/auto table instrument.

Telephone No. 333       Standard CB/auto wall mounted instrument (black, ivory).

Telephone No. 392LB LB instrument with trembler bell and three switch positions for use on extension plan systems on CBS No's 1, 2 & 3, LB or long CB/auto lines.

Telephone No. 393       Wall version of Telephone No. 392

Telephone No. 394       LB instrument with standard magneto bell and three switch positions for use on extension plans on LB or long CB/auto lines. See separate description for Telephone No. 394.

Telephone No. 395       Wall version of Telephone No. 394.

Telephone No. 396       Standard LB table instrument.

Last revised: February 05, 2023