How do I research the value of a 1777 British George III Farthing coin?

Answer 1

A British 1777 Farthing would belong to the First Issue of George III coins, but the "Handbook of the Coins of Great Britain and Ireland" makes no reference to a 1777 Farthing. None of the major British Coin catalogues make a reference to it either. The only Farthings minted in this period were the 1771, 73, 74 and 75 coins. The next issue of Farthings was the Third Issue in 1799. There was very little silver and copper minted in the later part of the 18th Century, and due to the lack of coinage, counterfeiting was rife at that time. It appears to be very likely that you have one of those counterfeit coins.