Seddig-Röhre R.I.W. Nr.73782 Triode, 1920Manufactured by • Fabriqué par • Hergestellt von : Röhreninstandhaltungswerkstatt
(RIW, founded in 1916) (= Tube Maintenance Workshop) in Würzburg (Germany). Professor Max Seddig (1877-1963). The tubes produced by RIW did not had a type number, only a serial number.
Hauteur • Height • Höhe : 11,8 cm • 4" 5/8 Physikalische Blätter Volume 13, Issue 2, 19 February 2013
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