SIERRA LEONE 1991 HANOVER ANNIVERSARY UNADOPTED DESIGN
150l Hanover Anniversary unadopted imperforate proof single prepared for the Anniversaries & Events issue of 20 December 1991. Affixed to thin card ex Questa presentation folder. Very scarce.
Note: similar designs were released 18 November 1991 for St Vincent and 23 December 1991 for Guyana
