The usage of coin weights, especially glass ones, goes back to Ptolemaic and Byzantine times.?Coin weights were also known in Ancient China. In Islamic civilization, where they are called Sanadjāt, coin weights are said to have been introduced by a Jew named Sumair in 694. Up to that point coins were only compared to coins of good quality. Islamic coin weights were made of bronze, iron, and later glass (considered to be unalterable). They bear inscriptions related to Islamic rulers and moneyers and are therefore valuable epigraphical objects. Coins weights were also known in the Carolingian Empire, where they were stamped with regular coin dyes to clarify their attribution. Islamic coin weights were introduced to Great Britain in the 9-10th century CE through the Vikings. My examples are considered to be early English Coin Weights. The first one is George III. It is 5 pennyweight, 8 grains. It is Counterstamped SK in tiny cartouche on both sides. This one is George IV, 1821 Royal Mint and it is also 5 pennyweight, 8 grains. It was used for gold guinea weight. This one is for the South Seas Co. it is a heavy weight for gold coins. It's very dark and there is a lot of light on it to get these photos. The top weight is on the left. The second weight is in the middle, and the heavy weight for gold coins in on the right. That silver thing on the far right is off my lawn mower. It needs to be replaced but it was enough to hold these weights on end to show them.