The flying-exercise codes were listed for quick reference on the reverse side of a handy blotter. Sponsored by a Perth firm of printers & stationers by the name of D. Leslie (whose advert is just off the bottom of this photo), it was doubly useful for the majority of us that used fountain pens (containing Parker permanent Quink, of course) for our logbook entries.
There have been a couple of recent threads in AH&N on the RAAF and RAF codes, which seem to have changed slightly over the years after WW2. As Pooch was a retired W/Cdr, and other senior instructors were ex-RAF, it's no surprise that the AST one was remarkably similar in 1966. Note, however, that "13" happened to be reserved for First Solo.
CSman,
As you have removed your post, I take it you have found how to post your 35-Course photo?