10l. red-orange in used bl.4 (pos.55-56/65-66), "0" inverted on CF (pos.55,56,65) and plate flaw white line crossing "MM" (pos.56). Right margin touched. Small vertical crease, but it is probably the most very fine bl.4 of this CF error. Still fine and very rare. (Hellas 26a+26aNb+26aNb10F11).