A pennyweight (dwt) is a unit of mass equal to 24 grains, 1⁄20 of a troy ounce, 1⁄240 of a troy pound, 48⁄875 avoirdupois ounce and exactly 1.55517384 grams. It is abbreviated dwt, d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd).
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👉 Pennyweight in the context of Troy ounce
Troy weight is a system of units of mass whose origin is uncertain. By far the most common troy unit is the troy ounce (oz t), the standard mass unit for precious metals in industry and in trade; it equals 31.1034768 grams. The troy weight units are the grain, the pennyweight (24 grains), the troy ounce (20 pennyweights), and the troy pound (12 troy ounces). The troy grain is equal to the grain unit of the avoirdupois and apothecaries' systems, but the troy ounce is heavier than the avoirdupois ounce, and the troy pound is lighter than the avoirdupois pound.
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Pennyweight in the context of Pistole
Pistole is the French name given to a Spanish gold coin in use from 1537; it was a doubloon or double escudo, the gold unit. The name was also given to the Louis d'Or of Louis XIII of France, and to other European gold coins of about the value of the Spanish coin. One pistole was worth approximately ten livres or three écus, but higher figures are also seen. The derivation is uncertain; the term may come from the Czech píšťala ("whistle", a term for a hand cannon), or from the Italian town of Pistoia; either way, it was originally spelled pistolet and originated in military slang, and probably has the same root as pistol.
A small number of gold pistoles and double pistoles were minted in Ireland in 1646, during the Irish Confederate Wars and the reign of Charles I. James Butler, 1st Duke of Ormond authorised the issue in order to prevent troop defections, as there was a shortage of silver coins for paying soldiers. The coins had an approximate value of 13 shillings (26 s. for the double pistole); they are today worth over £65,000, as only eleven examples are known to survive. They are the only gold coins ever struck in Ireland, except for a small number of proof and ECU issues. The pistole weighed 103 grains (6.67 grams; 0.215 troy oz) while the double pistole was 206 grains (13.35 grams; 0.429 troy oz); the fineness was 19 karat. The coins (also called "pieces" or "pledges") did not bear any royal symbols, simply their weight (4 dwt 7 gr, or 8 dwt 14 gr) on both sides.