Arabia. Petra under Caracalla (AD 198-217). AR drachm (17mm, 2.06g). Struck c. 211/12. Laureate head of Caracalla r., seen from behind / Turreted and veiled Tyche of Petra standing facing, head l., holding baetyl and trophy K. Bucher, "'Two Notes on Syrian Silver of the Third Century AD,” NC 1989, p. 171 (O1/R1). Possibly the fourth example known.