(#1622631) Mahogany back and sides with a Sitka Spruce top. Fishman Aura F1+ pickup system with vintage samples. Tortoise body binding. Ebony fingerboard. Gloss finish with Aging toner. 1 3/4" nut width. Sound patches for the pickup in this D-18 were created using a vintage 1937 D-18 played through various vintage and boutique microphones.