Celebrate the Century 1900s - 1950s - 6 US Postage Stamp Sheets of 15 Unopened

United States Postal Service: Celebrate the Century 1900s, 1910s, 1920s, 1930s, 1940s, 1950s - SIX sheets, each with a 15 stamp collection issued by the USPS commemorating the dawn of the 20th century. The stamps are 32 cent and 33 cent denominations, released in 1998. The sheets are encased in the original clear bags and have never been opened. These are sheets #1 through #6 as issued.