I have a signed Friz Freeleng Looney tunes painting. It has a Warner Brothers stamp of authenticity. It features Sylevester, Spike and Chester. It has a blank background. Does this make it a production cell? I cannot find this painting anywhere. The interesting thing is there is a Freeleng titled "anticipation" that has the characters in the same places but the background is designed. Any information on my piece will be greatly appreciated. Thanks!