Australian Officers Service Dress cap
post 53 Aussie made and issued SD cap with AA queens crown buttons. It came with the SAS badge on it so I have left it for now but I am certain the badge is a duffer, though it does appear to have been on the cap for some time. Traces of another badge can be seen so it is not the first badge to have been on the cap.
The cap was very sensibly priced, local to me and I have been after one of these for some time for my collection so I am very pleased.