Groat (coin) Groat (coin) The groat is the traditional name of a long-defunct English and Irish silver coin worth four pence, and also a Scottish coin originally worth fourpence, with later issues being valued at eightpence and one shilling. The name has also been applied to any thick or large coin, such as the "Groschen" ("grosso"), a silver coin issued by Tyrol in 1271 and Venice in the 13th century, which was the first of this general size to circulate in the Holy Roman Empire and other parts of Europe. The immediate ancestor to the groat was the French "gros tournois" or
Slug (coin) coin. The two original coins had a net value of under 10p at the then-current exchange rate. Coin detectors were soon reprogrammed to detect and reject the Austrian Schilling. Not long after it was possible to buy on the Internet a bag of 100 washers for under £20 that had been deliberately made to fool the machines into accepting them as £1 coins. Coin detectors were again reprogrammed to reject those slugs as well. The Irish pound coin in use from 1990 to 2002 was the same size as the old pre-decimal penny, so vending machines had to be modified