Stamps are canceled by a postmark, which shows they have been used and can't be reused.

The postmark is one of the most important features of a cover. The ceremony may also be held in a location that has a special connection with the stamp's subject. Postal authorities may hold a first day ceremony to generate publicity for the new issue, with postal officials revealing the stamp, and with connected persons in attendance. There will usually be a first day of issue postmark, frequently a pictorial cancellation, indicating the city and date where the item was first issued, and 'first day of issue' is often used to refer to this postmark. A first day of issue cover or first day cover (FDC) is a postage stamp on a cover, postal card or stamped envelope franked on the first day the issue is authorized for use within the country or territory of the stamp-issuing authority. There is a logo for Cooperstown Collection. Below the USPS copyright notice is the statement 'Major League Baseball trademarks and copyrights are used with permission of Major League Baseball Properties, Inc. There is a statement Official First Day of Issue. At the bottom, in slightly raised lettering it states Legendary Playing Fields. The left side has a brief text on the Crosley Field over a black and white image.

The stamp image value was twenty-one cents. This was canceled in New York City on Jun 27 2001. The other side has the canceled color stamp image on the right side. Format is 6 inches by 4.25 inches, color image of fan filled stands and the infield of the stadium on one side.

Playing marbles with diamonds