SIEMENS BROTHERS No. PTD 702

"AMPLIPHONE" TELEPHONES

P.T.D. 702
These telephones are specially designed to give receiver amplification for use in noisy Situations and are particularly suitable as a 'Deaf-Aid'. The amplifier is an integral port of the telephone.

Table telephone of the latest pattern, as the No. 356A/A, but fitted with an Amplifier incorporating a 'Transistor' operated by small dry cells and a potentiometer to control the volume.