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The second locomotive, serial #A1713, was completed in September 1958, and was first numbered GMDD 600 as a demonstrator. It was later sold to Brazil, where it was RFFSA 600 and later Rio Grande do Sul 6031.[4]
The unit is reported as having been subsequently scrapped.[5]
The third and fourth locomotives, #A1811 and #A1812, were constructed in September and October 1959 respectively; they were initially given GMDD 800 and 801. Both were sold to industry. #A1811 passed through a succession of owners.[6]
It was first sold to Electric Reduction Company (ERCO) in May 1961 as their #89; ERC sold it to S.G. Paikin through Malcolm Black Equipment Ltd, equipment dealers, in October 1972, who in turn sold it to Limestone Products in October 1973 as their #3-6902. It was sold once more to Malcolm Black Equipment Ltd in September 1979, who resold it in February 1980 to Raritan River Steel of (Perth Amboy, New Jersey) as their #3. It did not last there, returning to Canada again through Malcolm Black Equipment Ltd and being rebuilt by Peacock Bros. of Edmonton before passing to Hudson Bay Oil & Gas in Kaybob, Alberta as their #3 in January 1981.[7]
Hudson Oil & Gas became Dome Petroleum and then Amoco Canada Petroleum, for whom the locomotive remains (as of 2006[update]) operable.[8]
#A1812, meanwhile, was purchased by contracting firm Guy F. Atkinson Company as their #28151.
It was re-gauged to 5 ft 6 in (1,676 mm) gauge and shipped to Pakistan for the building of the Mangla Dam, where it still resides.[9]
