Cover fr. with 20l. blue (pos.144) with uneven control number (Kound 42.9), canc. "67" and "ΣΥΡΟΣ*8.ΔΕΚΕ.70", arr. "ΑΘΗΝΑΙ*10.ΔΕΚΕ.70". Position not mentioned in Koundouros study under uneven control numbers case. Rare, especially on cover. Very fine. (Hellas 31c).