Silvertone, made by...

Sivertone was a brand name used by Sears, initially for phonographs and musical instruments and in 1919 introduced for radios.

Almost all products were purchased directly from manufacturers.
The chassis number seen at the chassis label contains the manufacturers source code: the leading three digits are the manufacturers key.

100  Stewart-Warner
101  Colonial (formerly King Quality)
102  Majestic R&T (formerly Case Electric)
103  Emerson
104  Phonovision (formerly Corona)
105  Continental (later renamed Admiral)
106  ERLA (formerly Sentinel)
107  Howard
108  Automatic Radio, Boston
109  Detrola

110  Air King
113  Mission Bell
114  Pincor
115  Parris-Dunn
116  Electro-Acoustic
117  Grigsby-Grunow (Grunow)
118  Lafayette (Wholesale Radio Service)
119  Automatic Radio, Minneapolis
 
120  Sterling
121  Zenith
122  Warwick
123  Crosley
124  Operadio
125  Universal Battery
126  RCA Victor
127  Continental Motor
128  Crowe
129  Jackson

132  Noblitt-Sparks (Arvin) 
133  International Radio (Kadette)
134  Wilcox-Gay
135  Sonora Radio & Television
137  Conley
138  Erwood
139  General Transformer
   
141  Air King

Literature:
Mark V.Stein, the Sears Sivertone Catalogs 1930-1942

 
 

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