Lot 61733 – 1859 80c & 180c green, study including six common subtypes of both values from same positions

1859 80c & 180c green, study including six common subtypes of both values from same positions 4, 28, 75, 89, 131 and 183, possessing common flaws; (while both these values share common subtypes, those on the 120c. are unique to that value); very interesting and difficult to assembly; ex Scott.