Renowned for its precision and wide distribution, the American Waltham Watch Co. often produced private-label pieces for regional jewelers and trading companies. This example was retailed by the Portuguese Mercantile Co., San Francisco. The case is gold-filled, pair-case style with screw-off bezel and back, allowing the movement and dial to be removed as a free unit, 16 size.The movement is a stem-wind, lever-set, nickel-finished example with damaskeening, safety pinion, numbered 3301586. The dial is porcelain, featuring bold Arabic numerals, subsidiary seconds, decorative gilt star-and-scroll motif, and spade hands, signed Portuguese Mercantile Co., San Francisco.Pickup & Shipping: Free Sacramento pickup. Shipping via FedEx within the continental U.S. for $50 + 1.5% insurance (unless waived in writing). Combined lot shipping available. Currently running but untested for accuracy. Case with wear and surface marks. Dial with hairlines and spotting. Overall a collectible and unusual California private-label Waltham.