TANZANIA 1992 CANARY PROOF PERF 12½ x 12½ ON PRESENTATION CARD
10s Canary proof single perf 12½ x 12½ 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. SG1354var; SC979var
