Meters
Audibility Meter Type CR836
Use Wireless Specialty Adjustable Telephone No. CR835 with this Meter. Do not use Series Telephone with this Meter →
Calibration Headset, Frequency Meter BC-221-AU, BC-221-AK
Kolster Decremeter, Bureau of Standards, Type C
Kolster Decremeter, Type D
Pocket ammeter
Wireless Improvement Company, Type SE 965 Wavemeter, Made for the Bureau Steam Engineering
w/Loop Antenna
w/ 3 Coils, Meter 89 Coil 1, Meter 89, Coil 3, Meter 47, Coil 3 →
RF Antenna Current Meter, Model 400
WEM/WSO 200KW, installed in Marion MA 1919, Therm-Ammeter, No. 4599 →