Serial number 75042 was stamped on May 10, 1940 and cleared final inspection on September 6 that year.

The tuners are Grover G-111 machines with un-seamed butterbean buttons.

The guitar comes with what appears to be a style C case.

Style 28 features:

Back and sides: Brazilian rosewood

Top: Adirondack spruce

Purfling: Herringbone

Binding: Ivoroid

Back stripe: Zig-zag pattern

Other period features:

Scalloped X-bracing, rear X-braces

Ebony fingerboard

Ebony belly bridge

Steel T-bar neck reinforcement

1-11/16" neck width at nut

Tortoiseshell celluloid pick guard

Slotted square and diamond fingerboard inlays

Decal on front of headstock

No C. F. Martin stamp on back of headstock

Style stamp