Tailcoat set with lapis lazuli by J.S. Kahn, Pforzheim white gold, matted 750. Bouton set on the front with royal blue lapis lazuli, surrounded by small diamonds totalling ca. 1.60 ct; maker's mark. Very fine goldsmith workmanship. Total weight approx. 23.76 g. Gentleman's dress coat set, pair of cufflinks and four boutons set with lapislazuli and diamonds approx. 1,60 ct., in 18 k white gold. Manufacturer's mark.