Watch List notes:

EGYPT, Alexandria. Severus Alexander. AD 222-235. Potin Tetradrachm (23mm, 11.71 g, 12h). Dated RY 7 (AD 227/228). Laureate and cuirassed bust right / Conjoined busts of Nilus, wearing grain ear wreath and with cornucopia, and Euthenia, draped and wearing grain ear wreath, right; L Z (date) to lower right. Köln 2445; Dattari (Savio) 9937; K&G 62.93; Emmett 3128.7. Dark brown to black surfaces, traces of bare metal on the high points, minor porosity. Good VF.

From the Stein A. Evensen Collection. Ex Classical Numismatic Group 79 (17 September 2008), lot 736 (hammer $560).