RS3's were manufactured/imported by Weaver, and others, several times. Early models had horizontal drives. Recent models are the twin tower/twin motor, China drive. There was no cab interior, Weaver Model. Going, way back, some of the original hand rail detail was exceptional. IMO, Mike CT.
Model molds, and tool-ing, are rarely discarded, most likely shelved, (or sold), to be used again, 20+ years, from now. IMO, Mike CT.