Circa 1950s Gold doublé necklace with pendant enchanted with oval faceted intensief blue Aquamarine( probably synthetic) approx. 4.20 Ct Pendant hallmarked "Amerik K&L". (Kordes & Lichtenfels) K & L as Kordes & Lichtenfels , Pforzheim, Germany, established 1884. Kordes & Lichtenfels is renowned for making high quality jewelry pieces with exquisite detail. Size: 29.73mm x15.32mm Size Aquamarine: approx. 13.8mmx10 mm ca. 4.20 ct Colour: transparent intensief blue Chain is hallmarked: "Amerikaner A*D" Amerikaner/ doublé is basically 9kt or 333 to 375/1000 gold, could be higher. It is a process of double plating an item, created during the Austrian Empire period (prior to 1865) and assured a lifetime glow. Length chain: approx. 46 cm. Condition: in very good vintage state, beautiful necklace Sent signed with Track&Trace as signed package in new present ring box.