Compare the gold hairpins of this type also dated to the Song dynasty illustrated by Julia M. White and Emma C. Bunker, Adornment for Eternity: Status and Rank in Chinese Ornament, Denver Art Museum, 1994, pp. 183-4, nos. 95 and 96. See, also, a single similar example illustrated in Chinesisches Gold und Silber: Die Sammlung Pierre Uldry, Museum Reitberg, Zürich, 1994, p. 242, no. 292.
A Technical Examination Report is available upon request.