Red Baron was a car in the 1970 Hot Wheels series.
The story behind this casting is complex - in 1968 (possibly due to the popularity of the "Peanuts" cartoon character Snoopy's imaginary battles with the Red Baron) Monogram introduced a model kit of a stylized hot-rod incorporating a WWI German infantry helmet (Pickelhaube) and an Iron Cross motif on the radiator. In 1969, Chuck Miller built a working life-size version of the car, and the Hot Wheels casting appeared in 1970. Interestingly, although the Hot Wheels version has fenders (UK: mudguards), neither the Monogram kit nor Miller's car has them.
For a short time, Mattell owned Monogram, and the Hot Wheels "Red Baron" was included as a bonus in some model kit boxes.