Caption: A GMDH1 in the wild! PSPX 85, built as GMD demonstrator 800, is the third of only four twin-engined diesel-hydraulic GMDH1 units built by GMD London in the late 50's. At this point the unit is having a bit of an identity crisis: it's still lettered ERCO for its old owner Electric Reduction Company, but is now lettered PSPX 85 (after Hamilton dealer S.G.Paikin acquired it), but has been sold to Limestone Quarries Ltd for use at their Uhthoff quarry (later becoming unit 3-6902). The unit changed hand a few more times over the years before ending up in Alberta at Amoco Canada Petrolium

David H. Hamley photo, Dan Dell'Unto collection slide.