1918 Kings Norton Penny in Fine. In the reign of King George V the Royal Mint ran out of capacity to strike enough coins for everyday usage, so they contracted out the minting of some Pennies. One of the two Mints they used was the Kings Norton Mint, unlike the Birmingham Mint, the Kings Norton Mint had never struck coins for them before. They only made pennies for the Mint in 1918 and 1919 and all of these coins carry the ‘KN’ mint mark by the left of the date. Of the two mints, the Kings Norton is by far the most difficult to get.