Only shot from under my '70 rr I can find. Don't remember what the entire mark looks like in the middle. Besides the 2 white partials there, there is yellow stencil on front of axle tube, drivers side, I think. On the pass side (I think) right at the backing plate there's a plastic or maybe paper tag wrapped around the tube, too dirty to read, if it had anything on it. One thing I've noticed on restored cars is under the trunk lid. They always have an 'x' or tire size in some type of marker and the jack instructions are perfectly located. There are no marks under my trunk & the label was off center & rotated clockwise maybe 20 degrees crooked. Car is stored for winter but I'm putting on new seat covers & going through the engine /trans this Spring. I'll look for more marks & such.