This bangle is iro urushi (Japanese layered lacquer, Urushi is the sap from a staghorn sumac tree) but also has also been called camo bakelite or even Fordite (layers of oversprayed automotive paint).
Camo style iro Urushi bangle in shades of red and tan. The bangle measures 11/16" wide X 2 9/16" wrist opening X 1/8" wall thickness.