I didn't add it to the Ebay thread because it isn't a car but someone has put this under aviation, only 99p too. Potential RR badge.
cgi.ebay.co.uk/Rare-Old-Square-AA-Automobile-Association-Car-Badge_W0QQitemZ9521091741
cgi.ebay.co.uk/Rare-Old-Square-AA-Automobile-Association-Car-Badge_W0QQitemZ9521091741