A 1st Class (Grand Cross) Set, instituted in 1765. Sash Badge, 66x60 mm, in GOLD, both sides enameled, both central medallions gold with enameled details, original suspension loop, maker’s mark “IK”, hallmarked “56, double eagle”. Breast Star, 88 mm, with chiseled and pierced rays ; white enameled centre medallion with “SS” monogram in gold and red enamel, surrounded by chiseled border and white enameled border bearing golden motto“PRAEMIANDO INCITAT”, within green enameled outer circlet with four chiseled gold laurel branches; the reverse with hallmarked narrow pin, hallmarked “84, St. Petersburg”,maker’s mark “KEIBEL”, in original case of issue, with gilt inscription on the lid. A superb set of best Russian manufacture, from the 2nd half of 19th Century. I