TANZANIA 1992 FOUR-COLOURED BUSH SHRIKE PROOF PERF 12½ x 12½
15s Four-Coloured Bush Shrike proof on white paper compared to perf 12 x 12½ on cream paper of issued stamps, from Birds commemorative set issued 15 October 1992, mounted on signed Goznak (State Printing Works, Moscow) presentation card. Scarce. Fresh and fine. SG1355var; SC980var
