Shinjin never assembled this version of the Crown, indeed. They made the Crown from 1968-72. And by the time this version had entered production, Shinjin had already been renamed into Saehan (in 1976). This is a 1978-79 Toyota Crown.
Export versions were not RHD. I see no real difference from the Toyota. It even has the same badges on the back and upper part of the radiator. I have a few doubts that Shinjin made this specific version or that any of these Shinjin still exist in this condition.