Phil Marchese
If this has the tires separate from the wheels and the two spare tires, it is dervived from the German GBDM kit. That kit is a new parts release of Revell GB(UK) or Heller kit, all of which are based on the US Hudson Miniatures kit c.1954. The German kits are the source of the Smer Mercer and Packard part changes compared to the Revell GB and Heller versions.