to various hindrances which were only solved by tools that emerged in the 19th century, among them: Divisibility: Gold as currency was hindered by its small size and rarity, with the dime-sized ducat of 3.4 grams representing 7 days’ salary for the highest-paid workers. In contrast, coins of silver and billon (low-grade silver) easily corresponded to daily labor costs and food purchases, making silver more effective as currency and unit of account. In mid-15th century England, most highly paid skilled artisans earned 6d a day (six pence, or 5.4 g silver), and a whole sheep cost 12d. This made the ducat of 40d and the half-ducat of 20d of little use for domestic trade. Non-existence of token coinage for gold: Sargent and Velde (1997) explained how token coins of copper or billon exchangeable for silver or gold were almost non-existent before the 19th century. Small change was issued at almost full intrinsic value and without conversion provisions into specie. Tokens of little intrinsic value were widely mistrusted, were viewed as a precursor to currency devaluation, and were easily counterfeited in the pre-industrial era. This made the gold standard impossible anywhere with token silver coins; Britain itself only accepted the latter in the 19th century. Non-existence of banknotes: Banknotes were mistrusted as currency in the first half of the 18th century following France's failed banknote issuance in 1716 under economist John Law. Banknotes only became accepted across Europe with the further maturing of banking institutions, and also as a result of the Napoleonic Wars of the early 19th century. Counterfeiting concerns also applied to banknotes. The earliest European currency standards were therefore based on the silver standard, from the denarius of the Roman Empire, to the penny (denier) introduced by Charlemagne throughout Western Europe, to the Spanish dollar and the German Reichsthaler and Conventionsthaler which survived well into the 19th century. Gold functioned as a medium for international trade and high-value transactions, but it generally fluctuated in price versus everyday silver money. A bimetallic standard emerged under a silver standard in the process of giving popular gold coins like ducats a fixed value in terms of silver. In light of fluctuating gold-silver ratios in other countries, bimetallic standards were rather unstable and de facto transformed into a parallel bimetallic standard (where gold circulates at a floating exchange rate to silver) or reverted to a mono-metallic standard. France was the most important