unmounted mint 1962-73, a group of perforation shifts with 5c. in a lower right corner block of fifteen with perf. 1-2mm high and left, 50c. top right corner block of four 2½mm high and a horizontal pair with perfs. 5mm left; unmounted mint. (21)

Details
unmounted mint 1962-73, a group of perforation shifts with 5c. in a lower right corner block of fifteen with perf. 1-2mm high and left, 50c. top right corner block of four 2½mm high and a horizontal pair with perfs. 5mm left; unmounted mint. (21)