Caucasus Niello Napkin Ring Russian 84 Silver Mono IS. Antique Russian 84 Standard silver napkin ring, decorated with applied beaded borders and Niello patterns around the body. On the front, there is a shield cartouche, monogrammed “IS” in Cyrillic. Above the shield, there is a Niello inscription “Caucasus” in Old Russian. This catchy napkin ring is 1 3/4″ in diameter, 1 1/8″ tall and weighs 20.9 grams. The excellent original condition and clear, crisp detail, with no removals, repairs or alterations, make this an especially attractive offering. We will be happy to assist in this. We will respond within 24 hours.