Gabriel Dell signed first day cover.  Obtained through purchase.  Mr. Dell was rumored to be the voice of Boba Fett on the cartoons.  Another is listed for that.  I have talked with someone who was close to Mr. Dell and this subject came up and she said he did say he provided the voice. This is not proven yet, but it's an important autograph as is.  You might remember Mr. Dell for being in the Bowery Boys.