CHARLES WARREN Sterling silver salt pepper grinder set VINTAGE ITALY

This is for a set of vintage salt and pepper. They are both marked "sterling". The salt shaker says RD Sterling. The pepper grinder says "Made in Italy" as well as RD Sterling and Garantito Tre Spade with a logo. The bags that these have been stored have a CHARLES W WARREN which could be the logo on the grinder? They are tarnished but overall in very good condition. They stand a little over 2 inches tall. This item is cross listed so act fast!