Watch List notes:

John Comnenus-Ducas, as emperor of Thessalonica, 1237-1242. Half Tetarteron (Bronze, 19 mm, 1.72 g, 6 h), Thessalonica. +Iω Δ / KOMNH / NOC O ΔO / VKAC in four lines. Rev. IC - XC Cross potent set upon two steps. DOC 13. SB 2224. Very rare. Very fine.
From the collection of J. Aiello.