20l. blue in pair (pos.141-142) canc. "ΑΘΗΝΑΙ", very large/even margins all around. Plate flaw "narrow borders" (pos.142). Double "2" on CF on both stamps (Kound. 63.6.j) and uneven CF with the "0" higher (pos.142), position not mentioned in Koundouros study. Pos.141 CF with "0" upright and in normal distance from digit "2", while "0" broken. Very useful to determinate settings. Superb item. (Hellas 51b).