Not sure about that soldery-looking blob, either!Don't worry Stuart. It's been lovingly described as "The coin has not been cleaned and displays natural tone alover."
Would you believe it? Another Calais annulet issue of Henry VII?! This time from another of our friends. P.S. And a Henry V, also of Calais. Blimey. Forget DNW, CNG & Spink - eBay is the place for genuine rarities lately...
Perhaps a foreign coin made by the Royal Mint, they still produce about 15% of the world's currency coins. I've heard of cases of British coins being struck on foreign flans before, but I'm not sure I can help you here.
There's got to be more than one person willing to pay a premium, as they wouldn't reach this price otherwise. As for why, I'm not sure. This one sold for £320.
It looks like SG want to venture deeper into coins, to the tune of £42 million - not too sure I'm pleased but I'm doubtful it'll go through. http://www.standard.co.uk/business/business-news/stanley-gibbons-eyeing-a-bid-for-coins-firm-noble-at-42m-8811700.html