Along with regular bus service between the Kitchener Queen Street G.R.R. trolley station and the Galt Main Street G.R.R./L.E.&N. trolley station, C.P.T. operated a limited service from Queen Street to the Canadian Pacific Railway passenger station at Galt. Connections were made there with the C.P.R. mainline passenger trains travelling west to Windsor/Detroit and east to Toronto. Normally only one bus was required for this service, but on busy holiday weekends where more than one section of a passenger train was operated, I remember seeing as many as three C.P.T. buses parked at the Galt station. Passengers arriving, or departing on the mainline trains had the option of the C.P.T. bus service, or the electric interurban of the Grand River Railway, between Galt, Preston and Kitchener.

CPT 7 was originally purchased new by the Canadian Pacific Railway, probably for Quebec Central Transportation of Sherbrook, PQ. From April 1947 to May 1949 it was operated by C.P.T. for the Dominion Atlantic Railway of Kentville, Nova Scotia, being used between there and Kingsport, NS. In 1949 it was loaded on a railway flatcar and transferred to Preston. Nicknamed the 'QUEEN MARY', it was a true parlour coach with plush highback seats and window curtains. A front window sign was employed as the names on the destination linen were of places served by the D.A.R.

CPT 7 was sold to Lishman Coach Lines of Kitchener, Ontario and renumbered 57.