Thank you for viewing. This is a set of 10 stamp sheets from the "Celebrate the Century" series issued by the USPS (United States Postal Service). Each sheet features designs themed around each decade of the 20th century (1900s to 1990s), depicting historical events and culture. Would you like to have it as a collection or a souvenir? I purchased this in the United States quite a while ago and have kept it at home. I am selling it to someone who needs it, as I am decluttering. [Brand] USPS [Category] Stamp Sheets [Series] Celebrate the Century [Contents] Set of 10 sheets (1900s-1990s), with two sheets for the 1990s. [Condition] Unused, still in the unopened plastic bags. The outer plastic of 3 sheets has peeled off. This item has been stored at home for a long time. Please check the condition in the images. I would be happy to sell it to someone who understands that it has been stored at home. Thank you.