Vintage 1939 World's Fair "World of Tomorrow" Original 6 Novelty Buildings

These Green Plastic Sewing Buttons were originally sold on a cardboard card as a souvenir

The green plastic button of the Trylon and Perisphere is one of a set of 6 buttons shaped like buildings at the fair..

Plastic used was commonly used for sewing buttons at the time, called 'acetate', and there is a shank on the back of each one for sewing onto clothes.

Highly desirable collectible worlds fair item