Ballantine Laboratories MODEL 420 AC & DC Precision Calibrator

CERTA-CELL Solid State EMF Standard – CODI Semiconductor Lab Reference 117VAC

Electronic Development Corporation (krohn Hite) AC Calibrator Model 4503

6pc. 1000 Ohm Ω 1 kOhm 10 ohm Resistance Standard Resistor Calibrator crack

1000 Ohm 1 kOhm Ω Resistance Standard Resistor Calibrator Accuracy 0.005%

10000 Ohm 10 kOhm Ω Resistance Standard Resistor Calibrator Accuracy 0.005%

^ Ballantine Labortories 420 AC/DC Precision Calibrator Gray Case

1 Ohm 1 Ω Resistance Standard Resistor Calibrator Accuracy 0.002%