The bat loco on the left ('Ted') is based on a Keef K series diesel loco. Not sure about the one on the right although it looks fairly German. As for the origins, what are they made from? Saltford Models (long disapeared) used to make 16mm kits which comprised of a few w/m or resin castings, motor, gears, switch, wheels (usually white metal) and battery box and a drawing so you could make up the body (and sometimes the chassis) from plasticard. I know they did a Keef loco along with the usuall Ruston and Simplex designs.

Incidentaly I have an etched brass Saltford Keef loco in 009, one of only 20 made, waiting to be built.

They are made from what feels like pretty standard injection moulded plastic, certainly more like a mass produced item than something semi-scratchbuilt.. unless it has been semi scratchbuilt very neatly!!

I work with the people at Alan Keef a fair bit in my day job, so that might be a useful line of enquiry..

Cheers!

WOW I like these, never soon anything like them before!