Kay Musical Instrument Company (English Wikipedia)

Fjestad & Blue Book. Fjestad, Zach. "Kay [acoustic guitars]". Blue Book of Acoustic Guitar Values. Blue Book Publications, Inc.
"Source: 1950s/1960s company history courtesy Jay Scott, 50's Cool: Kay Guitars, contemporary history courtesy Michael Wright, Vintage Guitar Magazine, individual model listings: Michael Wright, Guitar Stories, Volume Two."
See also: Kay (electric guitars), Kay Kraft (electric guitars), Kay Kraft (acoustic guitars), Mayflower (acoustic guitars).

books.google.com

Inc, Nielsen Business Media (1965-10-02). Billboard. Nielsen Business Media, Inc. p. 55. {{cite book}}: |last= has generic name (help)
The Purchaser's Guide to the Music Industries. 1968. p. 238.
Inc, Nielsen Business Media (1967-03-11). Billboard. Nielsen Business Media, Inc. p. 84. {{cite book}}: |last= has generic name (help)
Maria Dugandzic-Pasic (2010), Croatians of Chicagoland - Images of America, Arcadia Publishing, p. 22, ISBN 978-0-7385-7819-4

Known for playing the Kay K161 Thin Twin electric guitar http://kayvintagereissue.com/vintageplayers.php.
"1961 Kay Catalog" (PDF). Kayvintagereissue.com. Retrieved December 9, 2019.
"Kay Vintage Reissue Catalog". Kay Guitar Company. 2009.
"1966 Kay Catalog" (PDF). Kay Musical Instrument Co., a division of the Seeburg Corporation.
"1960 Kay Catalog" (PDF). Kay Musical Instrument Co.
"1959 Kay Catalog" (PDF). Kay Musical Instrument Co.

"Musician's Friend Maintenance". Archived from the original on 2013-10-19. Retrieved 2013-10-18.

The Story of Kay Guitars, Told in 10 Reverb Listings by Frank Meyers, Jul 18, 2017 por Frank Meyers
"Who Really Invented the Electric Guitar?". reverb.com. 2017-06-28. Retrieved 2024-02-29.

"Ry's Hardware". RyCooder.nl. Archived from the original on 2014-03-30. Retrieved 2010-06-15.

Adams, S. Nathaniel (August 4, 2019). ""Identifying and Dating Kay Guitars"".
Adams, Nathaniel (August 4, 2019). "Identifying and Dating Kay Guitars". S. Nathaniel Adams.

"Identifying and Dating Kay Guitars". The Amateur Luthier. Retrieved September 30, 2020.

"Trademark 72207542". – "Truetone" was a registered trademark for musical instruments owned by Western Auto since 1964/1966 until 1989 (or since 1945/1947 until 1992 for radio receiver on trademark 71485315).

Michael Wright (February 2000). "1000 Years of the Guitar, Part 2". Vintage Guitar.
Lynn Wheelwright (September 2008). "Stromberg Electro". Vintage Guitar.
"New Sales Avenue Opened with Tone Amplifier for Stringed Instruments". The Music Trades. October 20, 1928. This tone amplifier is electrically operated either by alternating or direct currents. It consists of two major units -- an electro-magnetic pick-up and amplifying unit. The electro-magnetic pick-up is built within the instrument and is attached to its sounding board. The unit is connected with the amplifier, which produces the tone and volume required of the instrument.
Stromberg Electro Instruments (advertisement on catalog). Chicago Musical Instrument. 1929. Operated from light socket alternating current. No batteries required.
Wright, Michael. "Jack Westheimer — Pioneer of Global Guitarmaking". Vintage Guitar (July 1999). In August '69, the Valco/Kay assets were auctioned off and W.M.I. purchased the rights to the Kay brand name. W.M.I. began to slowly transition Teisco del Rey guitars to the Kay brand name, which gave them greater credibility with dealers. This change was completed by around '73 and the Teisco del Rey name then disappeared. This explains why you will occasionally see a Teisco guitar with a Kay logo.

"Kay Guitars (reissued in 2008-2009)". Archived from the original on 2008-03-11.
"Musician's Friend Maintenance". Archived from the original on 2013-10-19. Retrieved 2013-10-18.
"Ry's Hardware". RyCooder.nl. Archived from the original on 2014-03-30. Retrieved 2010-06-15.