Attica, Athens, AE Drachm, 6.73g. 20 mm. ca. 264-267 AD. 

Obv: Helmeted head of Athena right wearing aegis. 
Rev. AQHNAIWN, Athena standing right, head reverted and 
holding shield on outstretched left arm. 

Kroll 312. Dark green and brown patina with some red deposits. 

Item no. 47847 
good Very Fine $150.00

Courtesy of Edward J Waddell Ltd. www.coin.com, June 2010.