Valerian I. AE Tetradrachm, Alexandria, Egypt. AV KAE OUALERIANOC C KEYC, laureate, cuirassed bust right Eagle standing left, head right. L-D across fields. Year 4 = 256-257 AD. cf Sear 4511; Milne 3945. Estimate £20-£30 Courtesy of Lockdales.com. April 2010.