Great coin and sadly the Pobjoy mint is no more. Your coin was Pobjoy Mint's equivalent of the Britannia. They were a hugely innovative company who won a coin of the year award for a coin celebrating the first postage stamp and they introduced the first platinum bullion coin. @lordmarcovan had a couple of Pobjoy mint coins in his recent giveaways. The Isle of Man is famous for a breed of tailless cats and Pobjoy issued a cat coin annually. At one time Pobjoy were the Royal Mint's biggest UK competitor. Nice find!