50c Prairie Definitives on 2 Registered covers w/ Dented Bumper (723Aiii) & Black Sweater (723Aiv) constant varieties. 1981
Used 1981 within York county (YRK) with $1.50 paying registration + 17c for up to 30 gram domestic letter rate, total $1.67
Priced for the varieties however: 723Aiii Dented Bumper which appears on all sheets in positions 6 to 10 and 723Aiv Black Sweater which appears in position 22 but not on all sheets (per Unitrade)
