Thematics, Aeroplanes. Cover. 13 substantial albums of commemorative postal history with about 600 covers all focusing on the development of flight. The condition is uniformly excellent throughout and the owner's cost on the covers alone is the equivalent is about $5000, as virtually everything was bought individually as silks. Some of the countries include Great Britain, Grenada, Dominica, Tanazania, Liberia, Nevis, Falkland Islands, Fiji, Montserrat, South Africa, Gambia to name but a few. There is no duplication. The silks are not often seen on the market in collection format, offered intact as received.