One of these is in the Smithsonian labeled a “dosage meter.” It probably is part of a medical fake.
Analog Voltmeter 0-150 Volts DC
Cat.No. 3064 G
Analog Voltmeter 0-150 Volts DC
Cat. No. 3062 T
0 - 10 Amperes DC,
Cat. No. 3057S
Analog Voltmeter 0-7.5 Volts DC
Cat. No. 3057 K
Analog Voltmeter 0-7.5 Volts DC
Catalog No. 3057K
Analog Ammeter 0-5 Amperes DC
Model 280
Analog Ammeter 0-30 Amperes DC
model 280
0-10 Amperes DC
Model 280
0-1.5 amperes DC
Type DO-41, Model ABM219
0-50 milliamperes DC
Model 741-59
0-20 Amperes DC
Model 1531
