A SAPPHIRE AND DIAMOND GOLD CRUCIFORM BROOCH, the cross centred by the PAX symbol within two concentric circles with four cornerpieces of old-cut diamonds inset with four square-cut sapphires, with suspension ring, St. Petersburg, circa 1880, maker's initials unclear, in fitted velvet case stamped C.E. Bolin Joaillier de la Cour S. Petersbourg with Imperial warrant