From the VIN number, mine was produced 342 from the end of the production run so they were probably using up the parts they had left, and I’ve owned it since it was less than five years old so I expect it’s the original one too as it was too new for things to have started breaking! No UK cars were built with a/c but mine is definitely 2 plug and I’m sure that both plugs were wired when I fitted the Climatronic, I just had to add extra wires to the smaller plug.