I like the line stating you should avoid 1866 and 1871 halfcrowns, as these are forgeries. OK, thanks for the info..Quoting his eBay blurb here "Victoria's Half Crowns were struck from 1839 to 1901, none were struck between 1851 and 1873 because of the striking of the new decimal coin the Florin which was struck in its place. " Since when did decimalisation come into effect between 1851 and 1873? The florin was so-called a decimal coin, because it was a tenth of a pound.