CIRCA 1730, CADUCEUS AND DREHER'S MARK FOR DIETRICH TO THE TEABOWL; BLUE CROSSED SWORDS, AND INCISED 5 TO SAUCER, PAINTED IN THE WORKSHOP OF F.J. FERNE

See Robert E. Röntgen, The Book of Meissen, Atglen, 1996, p. 263 for information and an explanation on the use of both marks simultaneously.
For a composite tea service in the same pattern also enriched with in colors and gilt in the Ferner workshop, see Property from a Private Foundation, Christie's, New York, 23 May 2002, lot 280.