andy thats rude mate
i have never seen them before and 100% not all e platers will have those gauges....... i have an E plater outside

and my F plate crystal blue cossie is only on an F cos the first owner bought it on the 1st of august just to have the new plate letter
when you say the backs are the same are you saying that rs500 one and that funny sapph one is the same co if you are then that wont fit other sapphs like my own as the back conectors are different 100%
if that fitted you sapph then it must have had an early wiring loom same as a 3dr.