These new models by Moloco are of two ‘oddball’ cars, RBWX 64535 and 64536. The models carry these correct car numbers and a built date of 12-64. The two prototype cars are oddballs because they are three inches narrower and provide a few less cubic feet of interior room than the 535 cars built before them.
Western Fruit Express, Great Northern’s wholly owned private refrigerator car line, purchased nominal 50 foot inside length RBL cars with RBWX reporting marks during 1955, 1957, 1960, and 1962. Cars were all in the 64000 number series in ascending order as purchased. The January 1966 Equipment Register shows two cars, 64535 and 64536 with slightly different dimensions than their predecessors. The final lot of 50-foot RBWX cars were 64537 to 64556, built in 1966.
The AAR classified insulated box cars as bunkerless refrigerator cars, class RB, if the cars were insulated to a specific standard. Since the cars WFE purchased were equipped with adjustable loading or storage devices they were classed as RBL cars.
We suspect that these two cars were added to a run of cars that FGE was then building for another party to replace two cars that had been destroyed in derailments.