Elenco RS-500 Resistance Decade Box

Vtg. James Queen & Co. Philadelphia Decade Resistance box

Leeds & Northrup (L&N) decade resistance box Cat. No. 4780

PHIPPS & BIRD 236A RESISTANCE SUBSTITUTION BOX MODULE AS IS UNTESTED

James G Biddle AC-DC Decade Resistor Box 601145-1, 6 knob 0.01-1000, .05%

Vintage Heathkit Model RS-1 Resistance Substitution Box

Dale Technology Dale600 Electrical Safety Compliance Analyzer *GT10

FLUKE 8600A-3016 INPUT DIV REV A PCB CIRCUIT BOARD