Four pendants, 17th - 19th century (gold, enamel, pearls & precious stones)

Top left: A CONTINENTAL GOLD, ENAMEL, AND GEM-SET PENDANT 17TH CENTURY WITH LATER ADDITIONS Depicting Saint George and the Dragon, circular with scalloped edges of black and white champlevé enamel framing the figure of Saint George and the Dragon, surrounded by eight table-cut and collet-set rubies, the jewel suspended by a gold and pearl chain from a black and white striped enamel flowerhead decorated with five table-cut and collet-set rubies in the shape of a cross, the pendant suspending a pearl, apparently unmarked Top right: A CONTINENTAL GOLD, ENAMEL, PEARL AND GEM-SET PENDANT 19TH CENTURY Circular, the openwork back plate set with twenty-six table-cut rubies, surmounted by a red and white champlevé enamel cartouche decorated with seed pearls and a collet-set table-cut emerald, the sides mounted with translucent blue enameled C-scrolls, the center affixed with gold and enamel drapery swags, and a white champlevé enamel figure of a pelican in her piety, her breast mounted with a cabochon spinel and collet-set emeralds mounted to her outstretched wings, the reverse enameled in black, white, blue and green basse-taille enamel, two pendant pearls and three collet-set table-cut rubies and pearl pendants below, apparently unmarked Bottom left: A CONTINENTAL GOLD, ENAMEL, PEARL AND GEM-SET PENDANT CIRCA 1600 The openwork backplate with multicolored champlevé enamel, the center mounted with a high collet-set red gemstone surrounded by radiating gold flower heads, six baroque pearls, and two garnets, all set against later gold flowerheads, the reverse intricately enameled in blue, green and white cloisonné enamel, three pendant pearls below, apparently unmarked 3¼ in. (8.2 cm.) long Bottom right: A HUNGARIAN GOLD FILIGREE, ENAMEL AND EMERALD-SET PENDANT CIRCA 1700 The backplate pierced and enameled with polychrome foliage and set with four emeralds, centering a raised filigree cartouche with enamel flowerheads and set with five emeralds, apparently unmarked 2 5/8 in. (6.7 cm.) long