Vintage Sample Display Card of 27 Mid Century Lucite Buttons

27 vintage Mid Century lucite buttons mouled and carved into an interesting pattern
There are 14 colours in 2 sizes - 1.7cm and 2.2cm 
There are 3 missing.
They are on a display (38 x 27.5cm) card that would have been 
sent to suppliers or used by travelling salesmen as a sample card.