STERLING TELEPHONE AND ELECTRIC Co. Ltd
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:
Weight 6 lbs.
Size 10.5 in. x 12 in. x 4.5 in.
Taken from the Sterling Catalogue No. 11 & 12
Last revised: April 28, 2021