Looks like another possible Mesopotamian issue. Have you looked through those listings in various databases? Check the Edessa listings on Wildwinds. I think you'll find it there. http://www.wildwinds.com/coins/greece/mesopotamia/edessa/t.html
Thank you!!!!!!!!!!!!!!! CNG ebay - Mesopotamia, Edessa. Sev. Alexander. Æ Currently $31.00 May-16-01 Mesopotamia, Edessa. Severus Alexander. 222-235 AD. Æ 23mm (9.86 gm). Laureate bust left, holding eagle-tipped sceptre and shield / Tyche seated left before altar; stars flanking in fields. SNG Copenhagen -; BMC Mesopotamia pg. 108, 109; Lindgren I 2583; Dura 1458. VF, brown and green patina, rough surfaces. Scarce. 722721 http://www.wildwinds.com/coins/ric/severus_alexander/_edessa_AE23_BMC_109.jpg