Maigret - Mason - Queen - Wolfe - Holmes
Celebrated investigators of fiction on a set (700,000) issued on July 12, 1979. Multicolour offset combined with recess by the I.P.Z.S. in sheets of 40 on white unwatermarked paper perf. 13¼×14, with PVA gum, engraved by Giorgio Toffoletti.
Officially, REPUBLIC OF SAN MARINO, Italian REPUBLICCA DI SAN MARINO, small republic situated on the slopes of Mount Titano, on the Adriatic side of central Italy between the Romagna and the Marche regions and surrounded on all sides by the Republic of Italy. The republic's area of 23.5 square miles (61 square km) makes it the smallest independent state in Europe after Vatican City and Monaco and, until the independence of Nauru (1968), the smallest republic in the world. Pop. (1988 est.) 22,304.Encyclopaedia Britannica