I bought an F3 A/B unit at a train show today. They run great, but I can't find any identification of the maker. They were used, in a Spectrum box that was clearly not original. The decoders have a model number and 09 NOV 02 but no ID either. They are Rock Island with #124 on the number boards but no side numbers. They are black/red with the screen/grid across the top of the sides. Any suggestions for identifying the maker?
I found them. They are Intermountain F7's, not F3's. I identified them from the picture on the Wig-Wag site.