Continental Tube Laboratories
Continental Tire Corporation, 179 West Washington Street, Chicago, Illinois, USA
d/b/a Continental Tube Laboratories, 179 West Washington Street, Chicago, Illinois, USA
Last seen: 18-Nov-1927
Brand(s): Continental, Concert Master, Supertone
Supertone is registered by Continental Tire Corporation 15-Dec-1925, claiming use since 26-Sep-1924 - making Supertone one of their first brand efforts.
Continental is not listed in the Nov 1926 Radio Retailer Tube listings. They seem to have given up advertising in the US in 1926, though advertising in Australia then follows. This perhaps indicates that they were unable or unwilling to negotiate an RCA license. By 1927, you either had an RCA license, were involved in a lawsuit, or were out of business.
I suspect they ceased production in '26, and saw the opportunity to unload their products in Australia, and if the market sustained them, perhaps continue production. That didnt happen, and Continental tubes surfacing for Christmas 1927 were probably surplus.
I have observed at least three distinct Continental tube box designs. Concert Master details will be listed below with those variants.
- The Official Gazette US Patent Office, 15-Dec-1924, vol. 341, pg. 566. From Hathitrust.org. Retrieved 02-May-2019 *
- The Lansing State Journal, 04-Nov-1924, pg. 12. From Newspapers.com.
- Radio Digest, 29-Nov-1924, pg. 20. From AmericanRadioHistory.com. Retrieved 30-Nov-2018. *
- The Times-Herald, Lansing, MI, 02-Dec-1925, pg. 11. From Newspapers.com. Retrieved 30-Nov-2018. *
- Everybody's Radio, 19-Dec-1925, pg. 15. From AmericanRadioHistory.com. Retrieved 30-Nov-2018. *
- Queensland Radio News, Queensland, Australia, 01-Jun-1926, pg. 17.
- The Suburbanite Economist, 18-Nov-1927, pg. 1. From Newspapers.com. Retrieved 30-Nov-2018. *
- The Suburbanite Economist, 16-Dec-1927, pg. 6. From Newspapers.com. Retrieved 30-Nov-2018. *
- The Iowa City Press-Citizen, 06-Mar-1933, pg. 2. From Newspapers.com. Retrieved 30-Nov-2018. *
- The Emporia Gazette, Emporia, IL, 12-Sep-1933, pg. 3. From Newspapers.com. Retrieved 30-Nov-2018. *