Vintage Direct current milliammeter model C Sensitive research instrument comp

Vintage Sensitive Research Direct Current Meter.

Sensitive Research Instrument Milliamperes Direct Current Meter University 0-150

Sensitive Research Instrument Corporation Direct Current Millivolt Meter Model S

Sensitive Research Instrument Corporation Amperes Direct Current Model UMI

Sensitive Research Microamperes Meter Model Up

Jewell Direct Current MILLIAMPERES METER, 0-300, Pattern 88, 1912 Vintage

Honeywell MM2 Milliamperes Meter Gauge,Preowned Direct Current