|TERMINAL-STATION TELEPHONE FOR TRUNK LINE WORK No. 321
Similar to Telephone 320, but fitted with a 2,000 ohm bell shunted across the line, and a generator with five magnets, No. 482.
Specially used where several instruments are connected in parallel oil the same line, and all of them have to be called simultaneously when a signal is given.
Weight 20.5 lbs. Price £4 17s.
Last revised: October 01, 2019