Chevy Chase Signed Christmas Vacation 11x14 Photo Clark Griswold BAS 34701 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a 11x14 photo from the movie Christmas Vacation that was personally autographed by Chevy Chase. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.