RAAF Formation Sign
 

I had posted this last year as an unknown. This piece having come in a small group of British and Commonwealth signs. While searching for an unrelated item I came across the accompanying 2d photo. It appears this sign was worn on both shoulders of this RAAF uniform.
http://i877.photobucket.com/albums/a...psslv8hotp.jpg

http://i877.photobucket.com/albums/a...psjh4yakov.jpg

Photocredit. Rathbone Museum of WW2 Aviation. A wonderful site.