Celebrate the Century is the name of a series of postage stamps made by the United States Postal Service featuring images recalling various important events in the 20th century in the United States. Ten of these sheets were issued, with each sheet depicting events of one decade of the 20th century, from the 1900s to 1990s.Fifteen stamps were embedded into each sheet. For the first eight sheets (1900s to 1970s) of the fifteen stamps, one stamp of each sheet was printed using the intaglio process,while the remaining fourteen were offset printed along with the rest of the sheet. All the sheets were printed by the Ashton-Potter USA printing company. This also comes with a black binder that holds each year in a protective plastic page. Please note, there's an extra 1970's sheet. Sheets are approx 8"x 10" each. The binder is approx 10" x 12". The binder and stamp sheets are all in good, used condition with almost all of the stamp sheets with the exception of the 1940s are sealed in their original plastic. The 1950s stamp sheet also has a crease on the left side.