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Valve Adverts, Boxes and Brands

 
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BTH

Valve List
R Type Advert.
•Modern Wireless,
•January, 1924.
B4 Advert.
•The Wireless Constructor,
•December, 1924.
B8 Advert.
•Wireless World,
•March 23, 1927.
 B8 Advert.
•Wireless World,
•May 11, 1927.
2 Volt Range, B21, B22, B23 & B8 Advert.
•Wireless World,
•September 7, 1927.
B21, B22 & B23 Advert.
•Wireless World,
•October 5, 1927.
 B210H, B210L & B215P Advert.
•Wireless World,
•January 4, 1928.
Nickel Filament B210H, B210L & B215P Advert.
•Wireless World,
•February 8, 1928.
Nickel Filament B210H, B210L & B215P Advert.
•Wireless World,
•February 22, 1928.
 Mazda Nickel Filament Valves Advert.
•Wireless World,
•December 19, 1928.
 
 •See Also Mazda
•From 1929
 
  
 
 

R-Type

B4

B4 1925

LF407
 
 
 
 
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