I know of another three for certain, so the population will eventually turn out to be in double figures (if not three figures). I've got two, one of which I've had for several years without realizing they were that scarce. Hi Nick - two of what? The Halfcrown, Crown or the mule penny? Or two proof sets? There are (now I believe) three different proof sets - the standard set issued for general population (40,000 made); the VIP Set (as names implies) for special gifts and I suspect less than 100 made but could be as low as 20 and the (as far as I have been able to find) pre-production proof set that was given to advisers to the Bank of England. For the latter it is estimated that there are no more than six produced (but finding out details is quite difficult). Hi Bill, I highlighted in bold the relevant part of the reply, but in case it isn't that clear on some displays - I know of three (in addition to those known to CGS) of the 1+A proof halfcrowns. Gary D has two of them and I have another one. I find it hard to believe that there are so few of them. I found one within a few weeks of starting to look.