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History of the manufacturer  

Calvert Specialty Co.,Inc.; Philadelphia, Pennsylvania

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Name: Calvert Specialty Co.,Inc.; Philadelphia, Pennsylvania    (USA)  
Abbreviation: calvertspe
Products: Model types

In the November 1924 issue of The Radio Trade Directory, an advertisement on page 58 had the Calvert Specialty Company Inc. located at 1312 Callowhill Street in Philadelphia, Pennsylvania.

Trade Name: Calvert


This manufacturer was suggested by Alan Larsen.

Some models:
Country Year Name 1st Tube Notes
USA  24 Calvert Loop    


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

Fall 1924 Citizens Radio Call Book page 156tbn_usa_calvert_specialty_1924_citizens_radio_call_book_156.jpg