"for the recent 1.5 millionth Martin, the company went with a Leonardo da Vinci themeяcomplete with a Last Supper pickguard inlay, da Vinci artwork-inspired inlays, a Mona Lisa headstock, and a Vitruvian Man design on the back. To complete the one-and-a-half-year process, they turned to renowned inlay artist and luthier Harvey Leach (of Voyage-Air Guitars) and scrimshaw engraver extraordinaire Bob Hergert to apply their intricate art forms to this guitar. This historic Martin features an Adirondack spruce top and Brazilian rosewood back, sides, and neck. The pickguard scenery and background are crafted from jade, gray Corian, turquoise, sugulite, gaspeite, green recon, and dark ivory. The Twelve Apostles, Jesus, and their robes were made from Corian, spiny oyster, and pipestone recon, while skin tones were crafted from walnut-tree particles. All of the faces were engraved by hand by Bob Hergert."