"Coins are a unique window into the history of mankind," begins the introduction to the Postal Commemorative Society's edition "20 Centuries of Coins." Each century has a half page, 9 x 5-inch card, dedicated to a civilization, with a coin, a photo of artwork, prose descriptions. On the reverse is the reverse of the coin, the conclusion of the prose, and a map of the subject Empire. The first century is the Kushan Empire Tetradrachm, the last is the 20th century represented by Finland, the silver 25-pennia. In a brown, three ring binder, with all twenty pieces. Fabulous educational presentation. Date: Country (if not USA): State: City: Provenance: