A RUSSIAN GOLD LOCKET WITH MINIATURE PORTRAITS OF ALEXANDER II AND MARIA ALEKSANDROVNA ON MOTHER OF PEARL GROUND, WORKMASTER SAMUEL ARNDT, ST. PETERSBURG, LATE 19TH CENTURY the oval gold locket with miniature portraits of Alexander II and Maria Aleksandrovna set on a mother of pearl ground, marked with 56 standard and workmaster's mark SA in Latin for Samuil Arndt; overall dimensions including loop: 5.5 x 3.7 cm (2 1/8 x 1 1/2 in.), weight: 22.1 g (0.710 ozt)