Serial number 44124 was stamped on September 26, 1930 and cleared final inspection on November 22 that year.
The tuners are Grover #89 Deluxe banjo pegs.
Style 28 features:
Back and sides: Brazilian rosewood
Top: Red spruce (Adirondack)
Purfling: Herringbone
Binding: White ivoroid
Backstripe: Zig-zag pattern
Other period features:
Scalloped X-bracing
Ebony fingerboard
Ebony belly bridge
Ebony neck reinforcement
Nickel silver bar frets
1-3/4" neck width at nut
Small tortoiseshell celluloid pick guard
Slotted diamond and square fingerboard inlays
C. F. Martin stamp on back of headstock
No style stamp
Photos courtesy of Schoenberg Guitars