Scooby Doo and the Witch's Ghost Original Production Cel Signed by Bob Singer: Mystery GangMystery Gang MEDIUM: Original Production Cel on Printed Background PRODUCTION: Scooby Doo and the Witch's Ghost SIGNED BY: Bob Singer SKU: IFA5109 ABOUT THE IMAGE: The Hanna Barbera cartoon, Scooby Doo, Where Are You? was launched in 1969 and has had the longest run of a cartoon series. Over the years its been in 19 TV series (on CBS, ABC, the WB, Cartoon Network and Boomerang) and more than 40 animated films and two live action movies; one grossed