This Autographed Horizontal w/ Lewis 11x14 Photo has been Personally Signed by Chevy Chase of National Lampoon's Christmas Vacation. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. We conducted an autograph signing with Chevy Chase where multiples of the same item were signed. While the photographs are representative of this item, the size, placement and strength of the signature may vary. Each item is hand signed, therefore, each autograph is unique.