One Electron 1959...5-1/4" ± 1/8" 1" ± 1/16" Dimensions A. Overall length. B....
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One Electron 1959...5-1/4" ± 1/8" 1" ± 1/16" Dimensions A. Overall length. B. Greatest diameter C. Neck diameter Useful screen diameter of bulb. With a Tonotron tube, sharp, clear