Although this issue was apparently authorized by the Guinea postal administration, the vast majority of the issue was not sold in Guinea, but only distributed by the Guinea philatelic agency Impressor S.A. for distribution onto the philatelic market.
This issue is still being sold on the WORLDARTSTAMPS (Impressor) website over four decades later as of the year 2025.
Black surcharge.
Produced to sell overproduced series to collectors. Little to no evidence of postal usage.
Although this issue was apparently authorized by the Guinea postal administration, the vast majority of the issue was not sold in Guinea, but only distributed by the Guinea philatelic agency Impressor S.A. for distribution onto the philatelic market.
