South West Africa Postage Due 1931 Full Set M/UM Blocks

POSTAGE DUES: 1931 ½d - 6d (SG D47-D51). Full Set VF/UM/M blocks of four with additional shades of 1d, 2d, 3dx2, & 6d. See scan for detail. Minor adherence on the reverse of 3d blocks. Nice group. (cv£125+). See additional image below.