Pattern No. B85
Comprises - Granular Carbon Transmitter, Watch Receiver, Cord, Automatic Switch-hook, Induction Coil, Bell,
Push Button, Line Selector and Wall Rosette.
10, 15, 20, 25 & 30 line models.
Similar Pattern to B85 but fitted with a buzzer instead of a bell. It
also has stud stops with numbers in place of the semicircular number strip.
Taken from the 1903 Catalogue.