I got this recently, and think there was an error in the dealer's ID. It was listed as an Irish Philip and Mary 6 pence, 1557, but now that I look it up, I think only a groat and shilling were issued under the pair. I think perhaps they tried to ID it off a book of English coinage to get an approximate price, and got a nonexistent denomination. So my questions are: Does it look authentic? Is there a reference as to a fair price range for a coin like this? I'm sure the dealer would take it back if I request it, but I've never seen one before, and I'd rather know if it was a fair deal before I decide anything. Any advice much appreciated!
The only book I have that covers this Irish issue is the Coincraft one from 1999, so the prices are long out of date! It appears to be the Groat rather than the shilling as the date is by the crown rather than beneath the busts. Groats are much more common than the shillings. They do seem to turn fairly often and command good prices - I think because any Philip & Mary coin is difficult to get, so the monarch collectors will go for one of these rather than the more expensive English coins. The 1999 book gives prices: VG = £40, F = £85, VF = £280. With the market as strong as it is, I would guess multiply these prices by about 3. PS - I can't see anything to suggest it is a fake.
