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section of above image to enlarge in a new window
interesting tube tester, French made in the early - mid 1930's (I suspect). The
roll chart features American & European tubes from the early days;
(1920's) - to the mid 1930's. The left side of the roll chart shows US
tube settings, the right side are the European types.
All original except the meter scale which is my
reproduction. I still have the badly warped original if wanted. My replica
turned out so well that I doubt anyone would know it's not original.