10c blue on pale green 'Barranquilla' issue on coloured LAID paper, pin-perf, a fine mint block of four with variety pin-perf on outer edges only creating a block of four IMPERF BETWEEN VERTICALLY AND HORIZONTALLY. Very unusual. (SG 243B variety)
10c blue on pale green 'Barranquilla' issue on coloured LAID paper, pin-perf, a fine mint block of four with variety pin-perf on outer edges only creating a block of four IMPERF BETWEEN VERTICALLY AND HORIZONTALLY. Very unusual. (SG 243B variety)