Serial number 26709 was stamped on October 2, 1926.

The brass tuners are probably Waverly G-2 machines with white celluloid buttons.

The ebony straight bridge is a replacement.

Style 18 features:

Back and sides: Mahogany

Top: Red spruce (Adirondack)

Purfling: Lines

Binding: Rosewood

Backstripe: Single line of rosewood purfling

Other period features:

12 fret neck

Scalloped X-bracing

Ebony fingerboard

Ebony straight bridge

Nickel silver bar frets

Graduated fingerboard dot inlays

No style stamp

"C. F. Martin & Co." stamp on back of headstock

At the time of writing this guita isa availabe at Schoenberg Guitars (http://www.om28.com/ProductDetail?product=P180627002)

Photos courtesy of Schoenberg Guitars