A unique Adirondack and Koa custom made for Geoff Muldaur. Martin -- in their Custom Signature Edition series -- made reproductions of 12-fret slot-head 00-18s that were all sunburst and all made originally as lap-syle Hawaiian guitars back in the late 30s/early 40s. Geoff played an original that had been converted for Spanish-style playing on stage for years. (The guitars in the Muldaur series all have standard necks, not lap-style necks.) As with the others, the top of this guitar is sunburst, but unlike the others, the back and sides are beautiful highly flamed koa. And this particular guitar is the only one in the series that is koa--it's one of a kind. We've always loved this combination of woods for their extremely melodic and musical tonal quality, and this guitar has those qualities in spades.