Engraving of Frederick Charles, Duke of Schleswig-Holstein-Sonderburg-Plön and his consort Christine Armgard von Reventlow. A double portrait of the Duke and Duchess, each half length: the Duke with tied wig, lace tie, armour, sash, and ermine mantle, and the Duchess with jewelled earrings, low gown, and mantle. Each portrait is framed within an oval border of leaves, with a crown between, surmounted on a pedestal. Without titles, and with printed text on the verso. Plate from an unknown text.