Striking Vintage Sample Display Card of 24 Glass Buttons

24 striking vintage glass buttons in 3 sizes, 2.2cm, 1.7cm and 1.2cm, and 8 colours.
They are on a display (20 x 14cm) card that would have been sent to suppliers 
or used by travelling salesmen as a sample card
The card is a bit grubby.
But would still be Eye Catching in a frame, on the wall.