NIGER COAST 1897-98 6d,2s6d, 10s SPECIMENS, SG71s, 73/4sNiger Coast 1897 98 6d yellow brown, 2s6d olive bistre, 10s deep violet, overprinted 'SPECIMEN', watermark CA (type W1) for distribution to the Universal Postal Union (UPU) as examples for reference purposes only, SG71s, 73 4s Brilliant mint examples with large part original gum. Typical rough perforations as almost always seen, but lovely fresh colours and far above average. A scarce set in such fine condition. These were the last stamps issued by