Wow! This HAS been a fascinating series of posts! And who would have thought that our - sorry, that should probably be 'their' -own Sir Tony of Ganmain would be the initiator? I say, well done, Sir Tony!
Now for my 'tuppence-h'penny worth', to coin a pre-decimal phrase. All the Canadian Radar trailers sent to Oz that I have found record of, and the prime movers and support vehicles, fall within the ARN range 145959 to 146058, and 147737 to 147761. (There are none in the range 123801 to 123960: these are mostly CDN Lynx Scout cars). I have not counted them as yet, but will do so once the update is done (see below).
When I originally extracted the info, it didn't mean a lot other than to be 'unusual' and include some Chev CMPs which were my prime interest in that datablock. The radar sets were a pain to 'decipher' as they were described and registered simply as 'Trailer, Radar A' and 'Trailer, Radar B', so I didn't really have a clue what they were. But now, thanks to this post, I can put the 'A' and 'B' against the actual type. As the manufacturer was also recorded at the time, it nails each one down nicely: I think an update to the database is now needed, which will give me a total of each item.
Excellent work, gents, and I have to agree: the knowledge base on this forum is outstanding!
Mike C