English Ivory Chess Set, Calvert, ca. 1800-1820

English Ivory Chess Set, which in my opinion was made in the early 19th century by the Calvert workshop. One side is stained red, the other left natural. The Kings surmounted with Maltese crosses, the Queens with reeded ball finials surmounted by a feather finial, Rooks as cranellated turrets, the Knights as arched horses' heads, resembling early 19th century knights in the "Washington" style, the Bishops with split mitres.