The Chair of South Manchester Numismatic Society, of which I'm Secretary, contactd the Royal Mint on this one. They replied saying that it affected a whole batch and the figures are between 100,000 and 200,000 coins. Geoff one has just sold on Ebay for£138. I have two 20p with 1 above hm will be putting them on with the mule no date fiverboy Looks like the trend for the timebeing then is not downwards £138 being the highest achieved yet but might not last long as soon as the serious collectors have them..... Yes the ones with 1 above them are interesting too, I think it means die 1 the first ever batch of 20ps produced.... so is just as rare as the mule and interesting as the first of anything produced is always collected.. One sold on Ebay for £200 to a collector. There is another for sale £150.00