Here's a link to some photos of the JU52.

There were very few examples of the single engine JU52 but one was used extensively in Canada in the '30's.

This one on display at the Winnipeg museum has been converted from a 3 engine one. It was registered as CF-ARM, just like the original.
The original was powered by a Rolls Royce 'Buzzard' engine of 900hp.

http://collections.ic.gc.ca/bush_flying/mtwjnk52.htm#4

George