Vintage Graff Washbourne Dunn New York Sterling Silver Nut Salt Cellars Seashell. Weight as a lot: 104.1 g. Marked: Silversmith’s mark1748. The item “Graff Washbourne Dunn New York Sterling Silver Nut Salt Cellars Lot 4 Seashell” is in sale since Monday, January 6, 2020. This item is in the category “Antiques\Silver\Sterling Silver (.925)\Salt & Pepper ..