USA:
1810: Kelley's Universal Cambist records assays and weights for various circulated Dollars. Where the English Standard was .925 (37/40th Fine, or 222 per 240 dwts per English Troy Pound), c. 1809 assay of the 1795 Silver Dollar was rated 0.897916667 Fine Ag, 0.62% Better than US Legal Standard.
Citation: The Universal Cambist and Commercial Instructor, Being a Full and Accurate &c. Patrick Kelly (1811)
In 1792, the fineness of US Coin Silver was set by law at 0.892427885 Fine Ag.
Late 19th, 20th C.: the fineness of US Coin Silver has been assumed 0.892 Fine Ag.
1795: $1. = 0.867958333 Ozt
A Dollar (1795 - 1804) must weigh at least 0.864583335 Ozt
Erroneous assumption: fineness of USD Coin was not 0.89583 Ozt
France:
Spain:
~ 1 Real = 1 Livre
1795/6? : S$ 0.50 = L.T. 15.3 ∴
S$ 1. = L.T. 30.60; L.T. 1 = S$ 0.03268 (1.046 Reales)
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