Serial number 13602 was stamped on April 8, 1919. It was shipped to Southern California Music Co. in Los Angeles CA on July 30, 1919, which explains the Southern California Music Co. metal plaque on the back of the headstock.

Style 45 features:

Back and sides: Brazilian rosewood

Top: Red spruce (Adirondack)

Purfling: Abalone and lines on top, back and sides

Sound hole decoration: Abalone and lines

Binding: Ivory

Style 45 snowflake Japan pearl inlays

Style 45 abalone "flowerpot" headstock inlay

Style 45 backstripe purfling

Other period features:

Light scalloped X-bracing

Ebony fingerboard

Ebony pyramid bridge

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

No style stamp

No pick guard

At the time of writing (April 8, 2019) this guitar is available at Schoenberg Guitars (http://www.om28.com/ProductDetail?product=P181116001)

Photos courtesy of Schoenberg Guitars