The top once was on the Stromberg DeLUXE pictured above. The instrument had no serialnumber, but the telephone number on the label dates the guitar somewhere between 1928 and 1932. The top shows Elmer Strombergs archtop bracing in his early days.
Ronnie Brooks : Freddie Green’s 1940 Stromberg
Marcus Ohara : Stromberg guitars
Zachary R. Fjestad, Blue Book of Acoustic Guitars, 12th edition 2009, p. 641, 642
Jonathan Kellerman, With strings attached, 2008, pp. 278-286
Gruhn & Carter, Acoustic Guitars and other fretted instruments, 1993, pp. 195-200
Gruhn & Carter, Gruhn’s Guide To Vintage Guitars , 2010, p. 617
Thom Wheeler, American Guitars, an illustrated history, 1982, pp. 349-351