John Comnenus-Ducas. As emperor of Thessalonica, 1237-1242. Æ Trachy (21mm, 1.31 g, 6h). Thessalonica mint. Patriarchal cross / Emperor and St. Demetrius standing facing, supporting castle between them. DOC 27a; CLBC 14.17.3 (R2); SB 2213. Good VF, dark green patina. An attractive example.