A very nice example!! Tony Clayton,on his site "Coins of the UK", shows an example of 1673 halfpenny but without the 'B' of Britannia over-writing a 'C'. Plus a little history of the copper halfpenny.
http://www.coins-of-the-uk.co.uk/halfp.html#copper
http://www.coins-of-the-uk.co.uk/halfp.html#copper



















