This site catalogues and describes all the postage stamps ever issued by Nyassa and the Nyassa Company.
The site is divided into pages which cover the years in which stamps were issued – 1898, 1901, 1903, 1910, 1911, 1918, 1921, 1925, and the postage due stamps issued in 1924, as well as a brief history of the Nyassa Company and its stamp-related exploits.
Official website: http://www.nyassastamps.co.uk/