Carat (mass) quarters" of 15 grains troy each. Likewise, the ounce troy was divisible into 24 "ounce carats" of 20 grains troy each; the ounce carat was divisible into four "ounce grains" of 5 grains troy each; and the ounce grain was divisible into four "ounce quarters" of grains troy each. The "solidus" was also a Roman weight unit. There is literary evidence that the weight of 72 coins of the type called "solidus" was exactly 1 Roman pound, and that the weight of 1 "solidus" was 24 "siliquae". The weight of a Roman pound is generally believed to have been 327.45
Pennyweight the alternative drams and grains measurement has been used since a new set of scales was purchased by the Egton Bridge Old Gooseberry Society in 1937. As of 2018, the world record for the heaviest gooseberry of 41 dwt 11 gr was held by Kelvin Archer of Cheshire. The most common abbreviation for pennyweight is "dwt"; "d", for the Roman "denarius", was the abbreviation for "penny" before Decimalization of the British monetary system. Alternate abbreviations are "pwt" and "PW". Although the abbreviations are the same, the pennyweight bears no relation to the weight of the American penny nail. That name