Iirc S&D make a whitemetal kit for the earlier “squarish” one in 7mm. An example was parked, part built, on my old Windowledge Railway for a while. It’s now in a box...
I rather suspect I had several Airfix ones, which could be build with a flatbed trailer, or Watneys’ beer tanks. If they’d given away two wheels, a pair of springs and an axle, the aspiring modeller could have built both trailers, with attendant increase in play value... this simple act of generosity may have caused the whole course of history to have changed... or not, of course
I do recall them in the wild, in Liverpool Lime St, where they tugged box trailers of mail to & from the trains. I’m guessing, but 1963 or 64?
Best
Simon
Thanks to Osgood for correcting me re S&D! Link thingy to the other place where, scrolling down a photo or three, you’ll find my uncompleted model.
Great Windowledge Railway - Layout topics