12 Bakelite Brown Buttons- 2.2 or 18cm - on Original Display - Card Made in England

12 brown bakelite buttons - look like old radio knobs ! 
The Buttons are either 2.2 or 1.8cm in diameter and they have a single integral shank at the back.
They come on a display card - measuring 16.5 by 10.5cm.
Printed on the card is "Washable and Ironproof" - as well as "Made in England"
They came from an old button warehouse that I cleared.