see his couplers in this article, along with a little drawing by Temple Nieter of how the couplers were made). The trucks are very similar to the trucks on early Winther freight cars as well. For a pretty good view of a Winther truck see this article; it is actually possible that Winther made the castings for Nieter.
Back to the couplers, seen again in this final bottom view, what Nieter noted to me of the design was as follows:
Before my filed SC type [he used a modified SC coupler on his layout that was filed slightly so it would couple automatically] there was Howard Winthers’ made of 1/8 strips of tin-can sheet metal, shaped as a coupler, maybe from 1933! I knew him and adopted his style but quickly added the “hose” wire and the ramp idea on that kind.
Lon has several other cars with this that may or may not be Nieter purchased in the same lot, including a boxcar that has wires from one truck mysteriously running up inside! From his writings Nieter had some ideas about power distribution that were far ahead of his time (more here), one wonders if that car is related somehow. In any case thank you Lon for sharing these photos of these interesting, very early models.