Qoute from Richard Arnold, ARC: "The new company's corporate offices were located in Room 14108 of the very large Merchandise Mart building in Chicago, Illinois. It was estimated that the gross amount of business that would be transacted during the following year (1939) would be $40,000.

Sonora sales in the year 1940 were $200,000. On a list of 18 companies it was Number 14. It was doing better than Detrola, Farnsworth and Sparks Withington and tied with Wells-Gardner. Then the company moved again in September of 1943 to 325 N. Hoyne Ave., Chicago, Illinois."

The Sears Silvertone radios with chassis number 135- (the 3 first digits) have been made by Sonora.

The 1930-31 Sonora Models C34 and C35 were made for Sonora by the Stewart-Warner Speedometer Corporation of Belleville Ontario, which changed its name in 1931 to the Stewart-Warner Alemite Corp. Ltd.

In 1932, as Sonora Electrical Phono Co., cathedral style radios were exported to France and after a short time (a year or so) Sonora SA France was founded. The first radio of this company was Sonora F1 Puissant.

There was also a Sonora Corporation of Canada Ltd., which had two addresses: in 1924, the address was in Bridgeburg, Ontario; in 1931, it was 79-181 King Street West, Toronto, Ontario. The company made only 15 models, and In 1932, due to the Depression, moved back to the US. According to Lloyd Swackhammer in "Radios of Canada" the models were
1929-30: A 40, A 44, 31, 33
1930-31: 36, 36A & C38
1931-32: D50, D70
1932-33: S7, S10, S12, 8AW and D90
See the model pages for Sonora Canada. In the US, the "Sonora Tube Company" was located at 220 South State Street, Chicago, Illinois. See for Sonora tubes, which have been made by Arcturus. "Sonora A-C Tubes made especially for Sonora Radio sets." In existance there are DE-1 (is an Arcturus 127), RA-1 (AC48), RE-1 (180), RE-2 (181), SO-1 (AC40) and SO-2 (150). The Sonora BA-1 has never been found and has probably never been made.

On January 1, 1957, the State of Illinois decreed the Sonora Radio & Phonograph Corporation bankrupt again and for the last time.