Tasmania railways, Australia, centenary First Day Cover, 10 February 1971

This was a private 1,600 mm (5 ft 3 in) broad gauge railway that opened between Deloraine and Launceston to ship agricultural products to port for markets in Victoria.  It was taken over by the Government two years later and dual gauged for 3'6" (1067 mm) in 1876 and converted completely in the 1880s.