Back in the late 1960's Lima made a range of coaches for the american marked based on continental European models. All these coaches featured X2F couplings (NMRA standard). These couplings wer screwed on the bogie bar, which was a very unpleasant solution, as this screw hit the front wall of the coaches and left the bogie facing downward. Many of these modesls (in case you have the chance to find one of them...) have the lower part of the front wall grinded off (aftermarket) in order to let the bogie sit straight and swivel freely.
One of my coaches came in a yellow box numbered 9052, which is actually the catalogue number of the 10 axle torbedo iron carrier. Don't know if this number was used for the american coaches, too. Also here, information on this is highly appreciated.
To my knowlwdge only INOX-coaches, FS-RPO's and FS Y-coaches were used. Additional roadnames were New Haven (maybe also Wabash, not verfied).