The distinctive "zipper" pattern wood marquetry strip, as used on the back center seam of styles 28 and 21 Martin guitars before World War II.
This handsome backstrip is laminated with black fiber and natural unstained "white" wood.
1/4" x 1/8" x 23" (6.35mm x 3.18mm x 584mm)
TIP: Dimensions are approximate. For proper fit, the wood backstrip should be measured directly before joining the back halves on your instrument.
Also available: D-28 Style Backstrip, the familiar post-war "checkered" pattern.