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ID = 25201
Tube type:  Numerals- and Symbols indicating tube 
Identical to Z510M = 6770
First Source (s)
Oct.1963 : - - Manufacturers Literature Radiotechnique Memento tubes 10/1963

Filament --/--
Description Ziffern 0 bis 9 
Dimensions (WHD)
incl. pins / tip
35 x 30 x mm / 1.38 x 1.18 x inch
Information source - - Manufacturers Literature   Radiotechnique Memento tubes 10/1963

Z510M: valvo info 6/61
Egon Strampe
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z510m_a.png Z510M: Philips Pocketbook
Christian Schaufelberger

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Z510M: Radiotechnique Memento tubes 10/1963
Patrice Zeissloff

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