Heathkit Model RD-1 Resistance Decade Subsitution Box Circuit Prototyping USA

Vintage EICO Resistance Decade Box (Model 1171, Mostly Working)

3pcs General Radio Resistor Decade Box 1432-M 1432-P 1432-P Vintage Quality

Heathkit Resistance Decade Model RD-1 Decade Box

Vintage HEATHKIT Decade Resistance Model IN-11 Untested T

Resistor Resistance Precision Variable Decade Resistor Resistance Box 9999.9Ω

Heathkit Model IN-3127 Decade Capacitance Box - WORKS! Vintage