Combined Magneto and Buzzer Call
FOR MILITARY PURPOSES, RIFLE RANGES, RAILWAY TRACKS, OR TESTING
No. U 541
Portable Telephone (combined Magneto and Buzzer Call). Comprising 3 Magnet Ringing Generator, 1,000 ohm Polarised Call Bell,
Unbreakable Aluminium Hand Telephone with inset Receiver and Transmitter, Condenser, Induction Coil, Phonic Buzzer, 3volt Dry
Battery and Signalling Key.
All mounted in Solid Teak Case on Removable, Metal Partition, and provided with Leather Sling Strap.
Weight 6 lbs.
Size 10.5 in. x 12 in. x 4.5 in.
Taken from the Sterling Catalogue No. 11 & 12
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