Looks similar to the attached photo. It's captioned:
"In June of 1950, the Detroit Street Railway Commission approved the purchase of 80 St. Louis Car Company built "trackless" trolley-coaches for service on the DSR's Grand River line. The coaches were ordered in July of 1950 and were delivered between June and September of 1951."
But that seems too old? The Canadian picture seems newer?
(Photo is from the 50's section of the Detroit Transit History
website. Lots of cool info there...)