Oh, that white Matchbox Porsche! I've told the store elsewhere of how I, decades ago, lost my red one during a blizzard, causing great 'trauma' and commotion. It was later replaced by a white one, like yours. I always felt it looked 'wrong' because my original one was red, of course, little did I know how rare it was.
Finding a replacement for the white one nowadays is, as you know, very difficult and a price of £1 and no postage is mindblowing! What a great score!
Interesting with the casting error on the Range Rover. If it had been from the final days of Dinky where resources were low and quality control sloppy, I wouldn't have been to surprised, but the wheels seem to indicate a relatively early issue (I think it had har plastic Speedwheels towards the end?)
And while we're speaking of the Range Rover: does the tailgate on yours stay shut, or does it flip open constantly? I have two, one like yours except with light blue interior, and one street version in bronze. On both of them, the lower half of the tailgate pops open all the time. I can just about keep it shut for long enough to take a photo, but breathe on it and it falls open