John III, Ducas-Vatatzes (1222-1254). AE Tetarteron, Empire of Nicaea, Magnesia mint. Bust of St. George facing, nimbate, cuirassed, holding spear and shield. / Three-quarter-length figure of the emperor standing facing, holding labarum and akakia. Sear 2116; D.O. 58. AE. 1.95 g. 13.50 mm. VF.