What is the value of 1780 guilielmus shakespeare coin?

Answer 1

What you most likely have is a type of "Conder Token". In England, there was a shortage of official copper coins since the Royal Mint did not strike copper pennies, half pennies or farthings during the early reign of George III (they would resume striking copper coins in 1797). Because of the need of small change, people would either use counterfeit coins (they would be slightly underweight which allowed for a profit for the counterfeiter and because of the need for copper coins, counterfeiting of these small denominations was overlooked by the authorities) or they would use "tokens" made by businesses or private individuals for change. I can't seem to find any reference for a coin similar to yours, but assuming this is a copper coin, that might be a starting point to try to identify it.

If we assume for a moment this is indeed a conder token, the value is fairly modest if circulated. There are many rare varieties, but, although conder tokens are fairly widely collected, the values are much lower than what you'd expect to see in a US or official British coin of the same rarity. If we figure out this to be a common type, values would range from $3-$20 if circulated and $50+ if in better condition.