I’m going to just keep going through my junk box and making vids. Love this one. It’s an old Arnold Rapido of German manufacture. Generic design, with no real world prototype. Mostly looks like something that would have been made around 1890-1900, but a few details that make it look more like something from about 1910 or later. Given how frequently yard engines were rebuilt, its looks are not beyond belief, but still, it’s a little odd looking.