KT61 OSRAM BLACK BASE FROM JANUARY 1952 MISSING SPIGOT
On offer today we have a beautiful Marconi - Osram device. It tests with good emission as you can see from the attached test data label courtesy of our AVO VCM163.
The envelope carries the white inked cartouch showing a date code for January 1952 and the black base is tight to the envelope and shows clean uncorroded pins BUT the central base spigot is missing - a simply super device but be careful when mounting for use.
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