[Richard Coutts-Smith]

Thanks for your interest Lang, I have had contact with another MLUer who is certain that it is off an ACCO wrecker, mounted on the deck, but as I have not been able to find a pic to prove (or disprove, for that matter) that this is the case I feel that the ID remains unsolved for the foreseeable future. May have to drag it along to Corowa next year, always plenty of experts there.
Rich.