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History of the manufacturer  

Union Construction Co. (Master?); Oakland, California

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Name: Union Construction Co. (Master?); Oakland, California    (USA)  
Abbreviation: union-cons
Products: Model types

The Union Construction Company was located in Oakland, California.


Union Construction Co.; - Trade name Master

Some models:
Country Year Name 1st Tube Notes
USA  23 3 tubes   5 dials (primary tuning control knobs) 
USA  23 Master Receiver Type 250 UV201A  Union Construction Company Master Receiver Type 250