The Marx Hudson promotional:
There was one sign, however, that the company took making miniature cars more seriously than many toy manufacturers. Briefly entering the promotional vehicle market alongside Cruver, PMC, Banthrico and AMT, Marx produced what was its high point in the precision replication of a motor vehicle. This was a detailed promotional 1948 Hudson ("step-down" design) made specifically for Hudson dealers. The car was designed with the help of Hudson engineers who lent company blueprints of the actual car so tooling could be crafted for the plastic model. Dies for the car reportedly cost $35,000 and doors and rear quarter panel on one side of the model were molded in clear plastic (Automotive News 1948; Consumer Guide 1979, pp. 34–35). The chassis of the model was highly detailed in black with frame and cross members in colorful red.
See also https://www.maronline.org.uk/1948-hudson-promotional-plastic-model-cars/ AND https://www.oldcarsweekly.com/features/step-down-to-a-scaled-down-hudson