This is a full used set of Guinea-Bissau 473-78 History of Chess stamps, featuring the theme of chess. The set was issued in 1983 and cancelled to order (CTO) with a very fine (VF) grade. The stamps showcase the history and evolution of chess in Guinea-Bissau, and are a great addition to any sports or topical stamp collection. The cancellation type is clearly visible on the stamps, and they have not been certified by any third-party organization. The stamps were manufactured in Guinea-Bissau, a territory in West Africa.