Scooby Doo and the Witch's Ghost Original Production Cel and Drawing Signed by Bob Singer: ScoobyScooby Doo MEDIUM: Original Production Cel on Printed Background with Matching Layout Drawing IMAGE SIZE: 10. 5" x 9. 5" PRODUCTION: Scooby Doo and the Witch's Ghost, 1999 SIGNED: Bob Singer SKU: IFA10026 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