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History of the manufacturer  

DeWald Radio Mfg. Corp., Pierce Airo Inc.

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Name: DeWald Radio Mfg. Corp., Pierce Airo Inc.    (USA)  
Pierce Airo
Abbreviation: dewald

DeWald Radio Mfg. Corp.; 440 Lafayette Street, New York.

Until 1936 Pierce Airo used the trade name DeWald.
From 1937 on DeWald was the manufacturers name.
To avoid misallocations and double uploads and to allow easier search both manufacturers (if there is any difference ?) are put together in DeWald as a pool.
The accurate allocation is found at the individual models.
The problem is, that most literature does not clearly distinguish, and even Pierce Airo radios may bear the name DeWald. And that will be searched for, not for a hidden name

Some models:
Country Year Name 1st Tube Notes
USA  41 410A 1R5  Built-in loop 
USA  41 410R 1R5  Built-in loop 
USA  39/40 411 Phonoscope 12B8GT  Works as an autonomous record player with built in amp and speaker, as well as a wirele... 
USA  39 412 12K7GT   
USA  39 414 12K7GT  LW (147-353 kHz) and BC (535-1667 kHz) bands. 
USA  40 415 1A7GT  Built-in loop as first RF circuit. 
USA  50 418 12K7GT  LW (147-353 kHz) and BC (536-1667 kHz) bands. 
USA  34 42 78   
USA  34 425-R (425) 6D6   
USA  34 42R 78   
USA  36 430 6D6   
USA  34 440 6D6  With repwood panels. 


Further details for this manufacturer by the members (rmfiorg):