I had a presentation on the Early History of N Scale that I gave at the Louisville N Scale Collectors meet in 2008 (???).
I covered the Trix Rollmodelle ("Schiebetrix") metal pushtoys in 1:180 scale and the Rapido 200 lines. Somewhere in my travels somebody mentioned that the Rapido 200 or perhaps a predecessor Arnold product had a EMD F3, different than the metal electric motor powered Arnold Rapido F7.
In my youth I had the Nosco "Streamliners" which were N Scale size plastic windup EMD E A&B units that were a cross between the UP E-2 and Burlington E-5s with Pullman Standard Coach, Dome, and Observation Cars.
The story behind the Arnold Rapido version of the ROKAL TT coupler has been mentioned but many of you probably don't know that the first Sekisui Kinzoku (Kato) N Scale had 1/160 N.M.R.A. X2f Horn-Hook couplers!!
The MiniTrix N line F7A, Steel Gondola, Flat Car, PS1 Box Car, and Caboose were actually previewed at the Hobby Industry Show in Chicago in 1966 by Nathan Preston, a year before release as Postage Stamp Trains, a early Des Plaines, Illinois importer of German lines similar to Charles Merzbach in New York. The line was prempted from him by Aurora not unlike Arnold Rapido being taken over from Charles Merzbach as the importer.
Speaking of Charles Merzbach, he started a line after losing the Arnold Rapido importing to be called Charmerz. There was to be an entire range of products but only the smoker version of the Rowa N&W Y6B ever materialized. I suspect that the items that were intended to be in the line found their way to Con-Cor (RDCs), MRC later Aurora (freight cars) and Atlas (F9, GP30, GP9, 0-6-0T). Most of the production was by Roco.
Charlie Vlk