Salesman's Display Card of 41 Modernist Lucite Buttons

41 vintage lucite buttons  - a striking Early 20th century modernist design.
Each of the 14 colours come in 3 sizes - 1.6cm, 2cm and 2.5cm 
The largest navy blue is 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.