This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Baseball Centennial Issuec. en BaseballCentennialIssuec US Post Officebr scan of postage stamp by Gwillhickers US Post Office BaseballCentennialIssuec Image sources American History US postage stamps Stamps of the United States History of the United States on stamps Commemorative stamps of the United States Baseball on stamps