The U1 model was definitly a Fulgurex model and I doubt that it was marketed by anybody else, although firms like Gauge 1 America at the time might have gotten a batch to distribute it in the US. I knew John Van Riemsdijk very well, He was a very close friend of Antonio Giansanti, They both had a comune love of the French school of compound engines (which is how I became friends with him) which probably explains the choice of the De Caso hudson, as well as it having survived at the SNCF museum at Mulhouse. Another factor was the fact that this very popular engine in France had been marketed a few years earlier by Fulgurex in O scale with great success. This model's prototype had been built by Alain Baldit , who was long time curator of the Rambolitrain toy train museum and also friend of the count. This model was very refined as Baldit had really gotten the proportions of this very elegant streamliner just right. The thermodynamics of the engine benefitted from the great knowledge about compounds of JVR, the extraordinary capacity of the builder Aster, who had already designed a coal fired boiler for the japanese hudson and Baldits fine representation of that unique engine... (Although it should have been the prototype for a unified series of hudson for the SNCFwhich is why it was named U. A project which never came to light because of the french governement's order to the SNCF's direction which fell in 1949 to stop any research and production of new coal fired loocomotive, because oil had become so cheap at the time.) Like with most oriental fabrications it is possible that a few unnumbered examples have been produced beyond the original series or official reruns. Apparently Fulgurex had a hard time selling the batch as quite a few were sold at bargain prices at the time, including my own kit. Thanks to what, I got one!