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ID = 60572
United States of America (USA)
Brand: United Electronics Corp., Newark 4, N.J.
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to 305D
Similar Tubes
Other shape (e.g. bulb type):
  205D ; R205-D

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Industrial
Filament Vf 4.5 Volts / If 1.6 Ampere / Direct / Parallel, (AC/DC)

Locking pin rotated 45degs to prevent damage to other tubes put into the socket. Used in theatre amplifiers

Dimensions (WHD)
incl. pins / tip
45 x x mm / 1.77 x x inch
Literature - - Data from my own collection   

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