In the previous century it was common to print pictures of cars on promotional items. Examples? Cigar bands, matchboxes, postcards and sugarcube wrappings.
The print runs and their reach were enormous, but it is impossible to determine whether it has also increased sales enormously.

During my searches I ended up at alfje.nl, a site where you can buy these items (for pennies)

alfje 

A few examples:

850 bandje 1 850 coupe bandje 3

Cigar bands

850 doosje 1 850 spider doosje7

Matchboxes

850 kaart 1 850 Coupe kaart 10

850 kaart 14 850 Coupe kaart 19

Postcards

850 Coupe kaart 18