The design of swans swimming amid reeds is based on an etching by Wenceslaus Hollar after Francis Barlow (ca. 1626–1702).
Marking: Painted in underglaze blue on underside of each:  Crossed swords (factory mark); Stamped in paste under glaze on cup:  Maltese cross (unidentified, probably former's mark); Stamped in paste under glaze on inside foot ring on saucer:  6
Dr. Paul von Ostermann (until 1928; sale, Paul Cassirer and Hugo Helbing, Berlin, November 1, 1928, no. 164; to McClellan); General George B. McClellan