$6,000
Estimate: $7,000 - $9,000
Auction: October 17, 2017 11:00:00 AM EDT
Of oval shield-shaped form, the cartouche enamelled in cobalt blue, centering an imperial crown and the rose-cut diamond-set cypher of the Empress Catherine II Alexeievna, "The Great," encircled by a border of rose-cut diamonds.