| Triode TM RADIOLATM = Télégraphie Militaire (Military Telegraphy, Militärische Telegraphie). The TM, developed for the French Army, was manufactured from November 1915 to around 1935. In 1929, Radiola became a commercial division of La Radiotechnique, then of Philips. TM (triode): 
 
 Hauteur • Height • Höhe : 108 mm • 4" 1/4 
 
 
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