RAF buttons

[GTB]

Hi

A very interesting and noteworthy item. Evidently a good contender for wear by the PO grades - apart from the plain rim there is also a sharply defined lined background.
I surmise that the button is vegetable or plastic, possibly a type of resin or bakelite? I am sure there must be documentation lying around somewhere and which would throw light on the subject.
Thanks very much for sharing

GTB