A RUSSIAN GOLD, SILVER AND NEPHRITE EGG PENDANT, WORKMASTER HENRIK WINGSTROM, ST. PETERSBURG, 1899-1904 the nephrite body surmounted by a silver filigree finial set with diamonds, with a gold loop, marked with 56 standard, assayer's mark Ya L in Cyrillic for Yakov Nikolaevich Lyapunov, workmaster's mark H.W. in Latin for Henrik Wigstrom; length with loop: 2.5 cm (1 in.), weight: 3.2 g (0.100 ozt)PROVENANCEPrivate American collection