| http://www.w3.org/ns/prov#value | - up for auction from an estate we have an old radio tube - diode & battery tester - Made and marked Supreme Instrument Corp. - Greenwood, Miss. - Model 599-A - We plugged it up and the meter guage does work but we did not test anything as we are not collectors and do not have diodes or tubes available - All the black knobs & tube holders appear to be made of bakeolite - The black electric cord is g
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