Two jade dragon pendants similarly carved with a slightly flared blade behind the curled tail are illustrated by J. Rawson, Chinese Jade from the Neolithic to the Qing, British Museum, 1995, pp. 216-7, nos. 12:11 and 12:12, where they are dated Shang period, c. 1200 BC.
Rawson also illustrates, p. 227, fig. 1, related bird pendants with upswept wings which the author states became widespread in the Western Zhou period.