I have seen 8 since the first was identified two years ago, recently two have sold on Ebay as V over A, the Australian Ebay one shown (£235) and one a couple of weeks previously (£105),they were both in similar condition to your own, both of the auction winners knew the variety, and are forum members, I was an underbidder on both! Peckris is right when he says the Copper series is littered with similar overstrikes, deliberate as with dates and repairs for longivity of the die, but errors in spelling and setting out of the legends are less common, usually it is the first/last letters of the text, as with V/A, the first of VICTORIA, and the last of GRATIA, but there are a couple where the letters are side by side in the legend and have inadvertently been swapped. Chingford, i heard Michael Gouby was the underbidder on the Ozzy coin, so i'm assuming you work alongside him in some capacity?