It was also obvious that none of the sellers knew what they were either. They were advertised as toys anywhere from the '20s to the '50s, came with reserves of as high as $75... Some ads from a postwar toy industry magazine shed a little light.
I've never seen this full set for sale, but the crudeness of the gondola and caboose can be seen, most times if a train appears on ebay it will consist of only one of each in colours as shown in the top ad.
A quick Google map search shows the address of the long gone company today.