Antique Wallace Sterling Silver Clam Shell Form Dish Consign Now DeptSilverSizeWidth 6.25 in. Depth 4.25 in. Weight 2.8 ozt. Antique Wallace Sterling Silver Clam Shell Form Dish, lifelike open clam shell design, with “Wallace Sterling 393” hallmark upon the base. Width 6.25 in. Depth 4.25 in. Weight 2.8 ozt. Please note that this auction has ended. Click here for an overview of this auction.