Ah, thanks Phil. I did check Discogs but must have missed the "Austrian" one (on which I agree with your conclusions). I'll set this as a US release then. Great feedback - much appreciated.
Discogs has catalogue number 474742 2 as an Austrian release, most likely because the disc was made in Austria, but it was also released in Australia under that same number, and I remember that Sony here commonly imported the Austrian and other European pressings for Australian release, so that one would be the one to make International, and this one can go back to being US (the Columbia/Epic CK/EK-prefixed numbers were usually US and Canada only).
I've entered this as International even though it looks like a US issue. I can't find a different UK/European issue and it was definitely released here (obviously) so I'm concluding that this was "International", especially with it being on a major label. If anyone knows otherwise then by all means please let me know :-)
Long time want, finally arrived this week - chuffed. It's freely available of course but I buy so much music I have to be thrifty and it's usually a bit dearer than the copy I've just bought - £4 delivered! :-)