RARE Warner Brothers Stupor Duck Limited Edition Sericel 205/250 1991 w/ COA. The product is a rare Warner Brothers Stupor Duck Limited Edition Sericel from 1991, featuring the character from the Looney Tunes franchise. This animated art piece is a licensed reproduction of Robert McKimson’s illustration, with only 250 copies produced. The sericel comes with a Certificate of Authenticity and is a collectible item representing the western animation tradition of Warner Bros. This unique piece holds value as a limited edition item from the 1990s era of United States animation. 19″W x 16.25″H.