Serial number 66724 was stamped on June 24, 1937 and cleared final inspection on October 7 that year.
This guitar has advanced X-bracing and a 1-3/4" wide neck.
The tuners are Grover G-98 pointed plate machines with unseamed butterbean buttons.
Style 28 features:
Back and sides: Brazilian rosewood
Top: Red spruce (Adirondack)
Binding: White ivoroid
Backstripe: Zig-zag pattern
Other period features:
Scalloped advanced X-bracing
Neck 1-3/4" wide at nut
Ebony belly bridge
Steel T-bar neck reinforcement
Nickel silver T-frets
No "Made in USA" stamp on the back of the headstock
Photos courtesy of Steve Swan Guitars