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History of the manufacturer  

TWW / WTW, Tokyo Musen; Tokyo

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Name: TWW / WTW, Tokyo Musen; Tokyo    (J)  
Abbreviation: tww
Products: Tube manufacturer

Tokyo Musen

The logo of Tokyo Musen is a larger "T" flanked by two smaller "W"s, enclosed in a diamond. It can be read as TWW or as WTW.

There was a company Tokyo Wireless Telegraph and Telephone Co., Ltd. (Tokyo Musen Denshin Denwa Kabushiki Katsha) in the 1920s, supplying broadcast stations and emitters.

An example of a TWW or WTW tube is described in Tyne's "Saga of the Vacuum Tube" on page 468.

Further details are unknown.


This manufacturer was suggested by Mark Hippenstiel.


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