Back in the days before the arrival of the X2F, when every manufacturer had his own couplers, the tension-locks were not so uncommon. Fleischmann sold this one - litographed sides w/ slide doors, plastic roof, underbody, trucks and wheels w/NEM flanges in America. Charles C. Merzbach advertised it under the slogan: "Don't be a NOHOF" (Non-operating H0 fan )
Sorry, I goofed up the importers. It was C.C.Merzbach, not N.R.Preston!