This model of a Hendrickson tractor with twin trailers, marketed as the Inter-State Double-Freighter, has been issued in the following versions:
|Col #||Year||Series||Color||Decals||Base Color / Type||Window Color||Interior Color||Wheel Type||Country||Notes / Variations||Photo|
|M-9||1962||Major Packs||Blue & grey ||
COOPER-JARRETT. INC. or COOPER-JARRETT INTERNATIONAL 
|HENDERICKSON TRACTOR on base of tractor and INTER-STATE DOUBLE-FREIGHTER on base of each trailer.|
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