San Luis Obispo, California 
National Guitar

Maple, mother-of-pearl, ebony, nickel-plated brass, metal strings
ca. 1939
Length: 38.5 in; Width: 14.3 in; Depth: 4.75 in
Chordophones – Lutes

Etched below bottom bridge: PAT. NO. 1762617 / PAT. NO. 1741453 / MADE IN U.S.A.
Logo on peghead: NATIONAL (inside shield)
Stamped on back of peghead:  B3402 

This is a 1939, 19-fret National Style O resonator guitar.  It features etching of a Hawaiian/beach motif on the top, back, and sides of its nickel-plated brass body.   At the top of the headstock is the National shield emblem and name.  The neck is made of maple finished in a traditional sunburst with pearl dots inlayed in the ivoroid-bound ebony fingerboard. Everything is original including its hardshell case.  All instruments are hand-built in San Luis Obispo, California