The Operating Horse Transport Car No. 6473 would have the horses bob out of the side of the car as it was moved along the track. All variations have one WHITE and one BROWN horse. The four variations of this car have to do with the color of the plastic that was used, and the lettering that was on it. Produced from 1962 until 1966, it would be released again in the last year of post-war production: 1969. Came with early and and late AAR trucks. Earlier issues have disc couplers, while later issues have a combination of solid and operating couplers.