Vtg Hot wheels Redline Metallic Twin MIll Mattel Car 1968 Red Line Usa Lotvintage 1969 Hot Wheels Redline Twin Mill diecast cars, which were the first in house designed custom cars for the brand. Features: They are characterized by their dual exposed engines, "bug catcher" injector hats, and distinctive red stripe wheels (redlines). Colors: The cars in the image appear in metallic red, orange, and magenta purple variations. Significance: Introduced in 1969, this model is a highly sought after collectible selling off a