TEL 531
Telephone Tester Unit
TEL 532
Telephone Tester Unit
TEL 535
Telephone Tester Unit
TEL 539
Morse Code Sender Unit
ELEC 754
Electric Testing Equipment Universal Avometer
ELEC 753
Electric Testing Equipment
ELEC 751
Electric Testing Equipment Cossor Instrument
TEL 538
Morse Code Sender Unit
ELEC 755
Electric Testing Equipment
ELEC 756
Electric Testing Equipment Amperes Griffin
ELEC 762
Electric Testing Equipment Navy Chicago
ELEC 765
Electric Testing Equipment Camebridge Instrument Co.
ELEC 770
Electric Testing Equipment
ELEC 768
Test Set Demolition MKII
ELEC 767
Camebridge Substandard Watt Meter
ELEC 766
Electric Testing Equipment Wavemeter
ELEC 771
Electric Testing Equipment Ernest Turner
ELEC 773
Electric Frequency Meter Philadelphia