Can anyone provide the reference or original source for the information in the “comments” portion of the coin page for the Bolivia 8 Soles 1827-1840 coins that addresses their silver content? I am specifically interested in the formula for calculating silver fineness using the dineros/granos system that was in use in Bolivia during this time period and would like to learn more about it.
Although I am relatively new to Numista, I really like your website and have learned much in a short time from it. The level of detail is incredible and very helpful/useful.
Can anyone provide the reference or original source for the information in the “comments” portion of the coin page for the Bolivia 8 Soles 1827-1840 coins that addresses their silver content? I am specifically interested in the formula for calculating silver fineness using the dineros/granos system that was in use in Bolivia during this time period and would like to learn more about it.
Although I am relatively new to Numista, I really like your website and have learned much in a short time from it. The level of detail is incredible and very helpful/useful.
Text in Comments was added before sources started to be kept, so not possible to know where it came from.
At end, under “Technical summary” title can be read:
“Coins were defined by monetary regulations as so many minted per mark weight and of a certain minimum fineness. The mint mark used was the mark of Castile. It originated when Alfonso X (1252–1284) replaced the Roman pound (libra) with the Cologne mark. Spanish numismatists usually use the weight of this mark as determined in 1799, i.e. 230·0465 grams. The measure of fineness (ley in Spanish) for gold was 24 quilates (carats), each of 4 granos (grains); the measure for silver was 12 dineros, each of 24 granos.[5]”
It means pure silver (.999) was known as “12 dineros” (11 dineros= .91666; 10 dineros= .83333, etc.); then each dinero was divided on 24 Granos.
Therefore 1 dinero was equal to 1/12 or .083333, or 83.33/000; .900 was between 10 dineros and 19 granos (.899306) and 10 dineros and 20 granos (.902778).
Just 10 options: you understand binary, or you don't.
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