The guitar in this entry is a 1941 D-28 "herringbone".
It has rear-X bracing and the neck is 1-11/16" wide at the nut. Typical of other D-28 guitars of the period is has the scalloped braces,"zig-zag" back stripe and the distinctive herringbone purfling.
The tuners are period correct Kluson 511 machines. These early Klusons have a coined rim around the base plate and full thickness gear cogs.
At the time of writing (March 6, 2019) this guitar is available at Folkway Music.
Photos courtesy of Folkway Music.