Odd bullion wing,help

I have a bullion wing, roughly same size as std RAF pilots wing (but no crown) In middle, between wings is a circular ‘garter’ which has around it, ASSOCIATION -OF- BRITISH -AERO-CLUBS. In centre are silhouettes of two blue flying birds on a white background. I did a web search but cannot get an exact match, can anyone identify it ? poss 1930’s? Would it be to do with model aircraft clubs perhaps ? Basically what the heck is it. :confused: