Pennyweight
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A pennyweight 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 –
17th-century Irish weight, 8 dwt
Irish gold pistole, bearing its weight (4 dwt 7 gr) (National Museum of Ireland – Decorative Arts and History)
Silver half crown struck in Ireland c. 1642 with weight, 9dwt: 16gr (15 grams) stamped onto it.
Dram (unit)
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The dram is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system. It was originally both a coin and a weight in ancient Greece. The unit o
Silver Drachm from Dyrrhachium, Illyria dated c. 229 BC. Obverse: ΞΕΝΩΝ (Xenon) cow standing right, looking back at calf which it suckles, eagle standing right above; Reverse: DUR PURBA, square containing double stellate pattern, club to left. Size: 20mm; Reference: Ceka 360
A "wee dram", in Scotland the 35 ml measurement.