6 Powder Blue 2.8cm WW2 Propeller Shaped Buttons

These were made in French Canada in the 1940s in the shape of propellers - so the population could show their support for the war effort by sewing them onto the clothes they made.
They are casein plastic and they are 2.8cm wide.
I'm selling them in sheets of 6 or 12.
I also have them in several other colours and sizes