Large orange cachet on the front and postmarked June 12, 1931. Backstamp is Hilo, Hawaii on Jun 2, 1931. I assume the backstamp in Hilo occurred first, then the voyage by ship to California where the Goodyear Airship "Volunteer" transfered the mail to shore for the postmark. Reverse carries stamped signatures of key members of the ship's crew. Also a series of what appear to be ink Chinese characters in the center-front. About fair with some age toning.