Gee guys, thanks for all the replies. Great stuff. Yes, I originally thought it was an orchard PA myself, however the serial number of 133368 leads me to challenger, hence my confusion. I will attach a few pics of the carby side. To answer the other questions, Challengers are pretty few and far between down here. I believe that I have most of the different models that came down under including a few wallis tractors, however, I am on the hunt for a 201 which was supposed to have been sent down here. I will also post a new one on the Massey bicycles that I have found.