|Note_en={{Dating|seller}} Year confirmed by an advertizing on the back referring to a 1916 autumn catalog. Advertising for a gold and diamond [[overlay]] model ([[Waterman 51x]] ?) with a $150 price. | |Note_en={{Dating|seller}} Year confirmed by an advertizing on the back referring to a 1916 autumn catalog. Advertising for a gold and diamond [[overlay]] model ([[Waterman 51x]] ?) with a $150 price. |