Aurelian, with Vabalathus (270-275). BI Tetradrachm, Alexandria mint. Year 1 of Aurelian and 4 of Vabalathus = 270/1 AD. Obv. AYT K Λ Δ AVPHΛIANOC CEB . Laureate and draped bust of Aurelian right; L - A across field. Rev. I A C OYABAΛΛAΘOC AΘHNO Y ΑΥΤ C ΡⲰ. Laureate and draped bust of Vabalathus right; L - Δ across field. Dattari (Savio) 5422; Emmett 3914; K&G 106.69. BI. 7.38 g. 20.00 mm. Somewhat rough surfaces. Deep brown patina, lighter with reddish hues on high points. Good VF/VF.