There is another thread now on the subject, but I would say that I have definitely seen cameo contrast crowns of 1951 with mirror-black fields that I would not necessarily number amongst the "VIP". Or if they are, then the population of what some consider VIP will have to expand. I bought one labelled VIP from Spink many years ago that probably would be considered such.
But, to belabour the point, I think many would feel comfortable about those that are NOT VIP, but the same could not be said for those considered by some to be VIP. There IMO is a spectrum of presentation and strike for this 1951 crown, with much the same to be said about the 1953. 5,000+ quid for one of these? Spare me! Although this may portend well for later proof coins....