Watch List notes:

PONTUS. Trapezus. Severus Alexander, 222-235. Tetrassarion (Bronze, 29 mm, 10.74 g, 7 h), CY 162 = 225/6. AYT K CЄOY AΛЄΞANΔPOC Laureate, draped and cuirassed bust of Severus Alexander to right, seen from behind. Rev. TPAΠЄZOYNTIWN / ЄT PΞB Mithras, wearing Phrygian cap, riding horse to right; to right, small altar; to left, tree. RPC VI online 6629 (this coin). SNG Copenhagen 227. Very rare. An attractive example with a dark olive green patina. Very fine.