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(Movie is an enlargement through a loop of the signature). Hello all! I’m trying to determine whether this is an ink signature or a rubber stamp. It’s a letter from civil rights leader A. Philip Randolph to another civil rights leader about yet another civil rights leader (Bayard Rustin) so I love the content. I’ve never seen  a stamp of his but he usually signed in ballpoint pen so this is throwing me off. Any thoughts?