Keithley Model 502 Milliohmmeter

Insulation Resistance Tester M500 Megohmmeter Compatible with Supco M500 Megohmm

Simpson Ohmmeter Model 372

SIMPSON OHM CK08455L2 MEG0HMS / KILOHMS Analog Portable Meter With Leather Case

Vintage Simpson Model 372 OHMS Meter | Made In USA - UNTESTED cat no 12311

Insulation Resistance Tester M500 Megohmmeter Compatible with Supco M500 Megohmm

New Megger 1007-798 Duplex Connector Test Lead, for Milliohmmeter, etc.