Fox Autographed Marty in Puffy Vest Funko Pop Figurine #961- JSA W Yellow. This is a hand autograph of Michael J. Fox on a Marty in Puffy Vest Funko Pop Figurine, #961. This item has a James Witnessed Authentication, which comes with a numbered sticker and a matching JSA Certificate of Authenticity. You can view this item on the SpenceLOA website. It was signed either at a public autograph appearance or a private signing. This is a stock photo of the item. Although you may not receive this exact item, the item you receive is virtually identical and brand new in great shape.