Hawaiian Koa wood has a gorgeous distinctive grain pattern that flows from deep brown coffee heartwood, through lighter golden sapwoood. The Aloha Watch is one of Thorum's most recent product additions, perfect for a groom gift, groomsman gifts, or an anniversary present. The Aloha Watch pairs perfectly with The Aloha koa wood ring, a customer favorite wedding band. The koa wood watch and matching koa wood ring are simply beautiful and unique pieces to last you a lifetime. This design is paired with a minimalist, matte black on black on black case. The Aloha Watch is powered by an upgraded Japanese Quartz battery powered movement. The battery will last up to 3 years, and is easily replaced. Specs: Case Size: 44mm Case Material: Crystal Sapphire Movement: Japanese Quartz Movement Materials: 316L Stainless Steel Band: Genuine Leather Rating: Water resistant 3 ATM Battery Replacement Type: 364 Officially patented design. Unmistakably Thorum.