NATIONAL TELEPHONE COMPANY
B41 & B43

Portable Magneto Sets

Pattern No. B41

Comprises - Granular Carbon Transmitter, Watch Receiver, Cord, Automatic Switch Hook, Induction Coil, Bell (fitted on back board) and Push Button.

This is a very cheap instrument and the same general remarks apply as in the case of Pattern No. B40.

Pattern No. B43
This is another instrument of practically the same type and appearance as Patten No. B41, but differing slightly in detail, further it is fixed to a backboard the latter being mounted on a base and it thus forms a set very suitable for a warehouse bench, etc.

Taken from the 1903 Catalogue.