Linear Research LR 400 AC Resistance Bridge

Julie Research Labs DMR-105 10 Kohm/Step Precision Resistance Standard (SN: 248)

Michelson Interferometer Optics KITs Experiments & Research (Signal Oriented)

Julie Research Labs DMR-403 400 Ohm/Step Precision Resistance Standard (SN: 82)

LCR Meter Digital Electric Bridge Capacitance Inductance Resistance Tester

Julie Research Labs DMR-403 400 Ohm/Step Precision Resistance Standard (SN: 267)

Julie Research Labs DMR-403 400 Ohm/Step Precision Resistance Standard (SN: 233)

Julie Research Labs DMR-104 1 Kohm/Step Precision Resistance Standard (SN: 93)