The gold masks are stylistically similar to those seen on circular bronze fittings such as the example from the Ellsworth Collection, lot 1290; the example illustrated in Chinesisches Gold und Silber: Die Sammlung Pierre Uldry, Museum Reitberg, Zürich, 1994, p. 74, no. 12; and one illustrated by B. Gyllensvärd, Chinese Gold & Silver in the Carl Kempe Collection, Stockholm, 1953, pp. 64-5, no. 3.
A Technical Examination Report is available upon request.