This Scooby-Doo t-shirt features a far out and happenin' graphic of the Mystery Machine, along with the words "Since 1969". Scooby, Shaggy, Daphne, Fred, and Velma, ride to each case in their psychedelic-themed van. The animated series "Scooby-Doo, Where Are You!" first premiered on September 13, 1969 and the Mystery, Inc. gang has been going strong ever since then. Show everyone you're a fan of the groovy mystery-solving team with this Mystery Machine Since 1969 Scooby-Doo T-Shirt!