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A metric ounce is an approximation of the imperial ounce, US dry ounce, or US fluid ounce. These three customary units vary. However, the metric ounce is usually taken as 25 or 30 ml (0.88 or 1.06 imp fl oz; 0.85 or 1.01 US fl oz) when volume is being measured, or in grams when mass is being measured.
New gold nobles weighing 120 grains (7.776 grams; 0.250 troy ounces) of the finest gold possible at the time (191/192 or 99.48% fine), [56] (meaning 120gr @ 0.9948 fine = 119.38 gr pure gold) and valued at 6 shillings and 8 pence (80 pence, or 1 ⁄ 3 rd of a pound).
The Spanish gold onza (or 8-escudo coin) was of identical weight to the Spanish dollar but was officially valued at 16 silver pesos, thus putting the peso on a bimetallic standard, worth either the silver Mexican peso (27.07 g 0.903 fine, or 0.786 troy ounce XAG) or 1 ⁄ 16 the gold onza (1.6915 g 0.875 fine, or 0.0476 troy ounce XAU), with a ...
the troy ounce for transaction in precious metals. [ 60 ] [ 117 ] [ 72 ] Goods and services sold by a description, as opposed to a price per unit quantity, are not covered by weights and measures legislation; thus, a fence panel sold as "6 foot by 6 foot" is legal, as is a 6 × 4 inch photograph frame, but a pole sold as "50 pence per linear ...
The New Currency Act of 1871 introduced Japan's modern currency system, with the yen defined as 1.5 g (0.048 troy ounces) of gold, or 24.26 g (0.780 troy ounces) of silver, and divided decimally into 100 sen or 1,000 rin. The yen replaced the previous Tokugawa coinage as well as the various hansatsu paper currencies issued by feudal han (fiefs).
In 1828, platinum coins were introduced with 1 ruble equal to 77 2 ⁄ 3 dolya (3.451 grams). On 17 December 1885, a new standard was adopted which did not change the silver ruble but reduced the gold content to 1.161 grams, pegging the gold ruble to the French franc at a rate of 1 ruble = 4 francs.