Don’t you mean Big 15? It came with my 54 Light 15 ten years ago and the people I got it from imported a 48 and the 54 from South Africa when they returned to Canada in the 1980s. Included with the two cars was a bunch of parts that came from a car they had scrapped, I assume the plate came from that car and I naturally assumed it was a Light 15 as well.
The guy saved everything, even a brake drum with a chunk missing out of it. That I didn’t bother taking home. Lower control arms, brake backing plates, all kinds of things I had no use for and most of it went for scrap as I couldn’t spare the room for it. The 48 light 15 was in nice shape, me and a friend put in a clutch, new brakes and other items, the owners kept it for a while and then sold it on to someone in Edmonton, Alberta. That one had the heavy chrome South African bumper over-rider bar in the front and not one speck of rust.