A VERY RARE MARCONI Z21 VINTAGE PENTODE

RARE CLEAR GLASS BLACK BASE

SHOULDER SHAPED TUBE AND MADE IN ENGLAND 1940’s

VALVE /  ELECTRONIC TUBE

FULLY TESTED AND TESTS PERFECT

THIS IS A VERY RARE COLLECTORS ITEM AND COMES IN AN ORIGINAL VINTAGE RED BOX OF MARCONI

You can Bid& Buy with confidence. Valve is fully tested on AVO Valve characteristic meter 163. I will offer 7 days money back guarantee should you be unsatisfied with the valve.  Please contact me to arrange the return (you would only pay the return shipping - the original price+postage would be fully refunded the day the tubes are received). Valves must be returned in the same condition they were shipped - if you are not sure you want to keep the tubes, please handle them with care.