Featured is a Juan Marichal, Orlando Cepeda, and Gaylord Perry signed San Francisco Giants envelope. This envelope was hand signed by Juan Marichal, Orlando Cepeda, and Gaylord Perry and slabbed and authenticated by Beckett grading services. This card would make a great addition to any sports memorabilia collection.. SPECIFICATIONS Autographed By: Juan Marichal Team: San Francisco Giants Sport: Baseball Authentication: Beckett Grading Services