Cf. K. Butler, op. cit., no. 128; Dr. Erika Pauls-Eisenbeiss, German Porcelain of the 18th century, vol. 1, p.89; Ingelore Handt and Hilde Rakebrand, op. cit., no. 118; and a similar example sold in these Rooms, 29 June 1987, lot 235