GS1a (some sources refer to it as GS1b) was put together for the US market using American cars. You have to put the Thunderbirds on the bottom because the Plymouth and the Chevy are just too wide to fit the bottom deck, there's also an issue with the length of the cars, if you don't arrange them right, they don't fit.
This group has been put together using models from my collection.
The models which made up the Transporter Gift Set - 1 were:
