Serial number 74767 was stamped on April 11, 1940 and cleared final inspection on October 8 that year.
The tuners are Waverly 5038 mchines with rounded metal buttons. These tuners have a distinctive backing plate and are sometimes called "Yoda head" machines.
Style 18 features:
Back and sides: Mahogany
Top: Red spruce (Adirondack)
Binding: Tortoiseshell celluloid
Other period features:
Ebony belly bridge
Steel T-bar neck reinforcement
Nickel silver T-frets
Dot fingerboard inlays
No "Made in USA" on back of headstock
"C. F. Martin & Co." decal on headstock
Lower bout : 14-7/16" Upper bout: 10-13/16"
Body length: 18-13/16" Scale length: 24.86"
Depth of body at neck block: 3-5/16" Depth of body at end block: 4-1/16"
Neck width at nut: 1.69" String spacing at bridge: 2.14"
Photos and dimensions courtesy of Ted Hutson