1900 Large hermes heads surcharges, 40l/2l. (wide 0) in corner block of 4 (pos.131-132/141-142), u/m. Var. "space 2mm" (pos.132). Unique block of 4 in the sheet of 150. Oval canc. "ΕΛΕΓΧΟΣ" on gum side. Superb. (Hellas 156A+156Ab - 420 euro).