Three vintage Royal Australian Air Force bakelite buttons.
These black World War Two era buttons are small, medium and large in size.
The small button is 1.7 cms in diameter.
The medium button is 2.4 cms in diameter.
The large button is 2.7 cms in diameter.
The buttons photographed here are the very same ones for sale.
I combine postage for multiple items.

Questions and offers welcome.