Watch List notes:

John Comnenus-Ducas. Emperor, 1237-1242. BI trachy (16.3 mm, 0.69 g, 12 h). Brockage strike. Thessalonica mint. Incuse of the reverse / Facing busts of John and St. Demetrius facing; patriarchal cross between. SBV -; DOC -; CLBC 14.4.4. VF. Very rare. 

Ex CNG E-auction 352, lot 626.