The series of 1 Sol coins from Peru, minted between 1864 and 1916, constitutes one of the most interesting chapters in South American numismatics. During that half-century, political upheavals, wars, and monetary reforms left their mark on the production of these silver coins. Some issues were abundant and are easy to find today; others, however, were produced in small quantities or under special circumstances, and have become highly sought-after pieces for collectors. This article reviews the rarest issues, grouping them according to the periods and the reasons that made them so rare.
First issues and initial variants
The origin of the Peruvian Sol was not a single event in 1864, but rather the result of a process that began with the monetary law of February 1863. During this initial stage, the State directly assumed the minting of the new coins, focusing on fractional denominations and gold pieces, while the one-sol unit was not yet produced. This period was marked by the transition from a weak currency to a monetary system aligned with the new silver law.
In early 1864, a second phase began with the granting of the refining and minting rights to a private firm headed by Dionisio Derteano. It was then that the first silver Soles began circulating, bearing the surname “Derteano” discreetly incorporated into the cornucopia of the coat of arms. This mark provoked a strong public and political reaction, as it was considered an alteration of national symbols, leading to orders for remelting and manual corrections of many pieces. From the middle of that same year, problems with weight and quality led to new regulations, resulting in a more controlled and stable production.
Although the official order was given to remelt all Soles bearing the surname "Derteano," in practice many coins were not melted down but rather had the letters removed manually. Therefore, today we find examples from 1864 with the complete mark, others with visible remnants, and some with the inscription partially erased—a diversity that stems directly from this initial controversy.
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The unique coinage of 1873
The year 1873 holds a unique place in the history of the Peruvian silver Sol due to an extraordinary situation that forced the country to resort to an unprecedented solution. At the beginning of that year, the Lima Mint was practically paralyzed as a result of a modernization process that rendered its workshops inoperative for several months. The lack of adequate equipment, coupled with the gradual commissioning of new machinery, coincided with a severe shortage of coinage in the markets, further aggravated by the export of coins by private individuals. This combination of factors generated a monetary crisis that made it impossible to meet the domestic demand for Soles through local production.
Faced with this situation, the Peruvian government decided, as a temporary measure, to authorize the minting of national currency abroad. Thanks to diplomatic efforts undertaken in early 1873, authorization was obtained from the Chilean government to produce nine-tenths Peruvian silver soles at the Santiago Mint, as a gesture of courtesy between the two countries. Production was subject to specific conditions: only one-sol coins would be minted, a monthly production limit would be established, and technical supervision would be the responsibility of assayers appointed by Chile, whose initials LD would be inscribed on the coins. To ensure control of the process, dies, silver bars, and an official observer were sent from Lima to oversee the minting process throughout its duration.
This experiment concluded in December 1873, after more than nine months of activity, during which a small number of Soles were produced compared to the usual volumes of other stages of the series. The minting in Santiago was exceptional not only because it took place outside Peruvian territory, but also because of the economic emergency and its strictly provisional nature. These circumstances explain why the 1873 Soles with the initials LD are among the rarest issues of the Peruvian 1 Sol coin and are especially valued by collectors, both for their scarcity and for the historical episode they represent.
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Limited emissions in the post-war period
The resumption of Sole minting after the War of the Pacific did not signify an immediate return to monetary normalcy. The country emerged from the conflict with a deeply fragmented system, saturated with devalued paper money, and with a population that openly distrusted the government's currency. In this context, the State embarked on a long and complex process of amortizing the fiduciary currency and rebuilding the metallic currency in circulation, which directly affected the pace and volume of silver coinage. The priority was not to flood the market with new coins, but to gradually restore the credibility of the silver Sol as an effective means of payment.
The 1886 series, identified by the initials TF and BR, falls squarely within this process of monetary reform. That year, measures were adopted that favored tax payments in silver soles and relegated banknotes to a marginal role, increasing the pressure on the existing metallic currency. However, far from generating abundant coinage, this policy resulted in sporadic and controlled issues, which explains the current scarcity of 1886 soles. This was further compounded by internal political instability, the lingering effects of the civil war, and the persistence of demonetized regional economies that resorted to the already weak substitute currency.
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The last silver suns
The series concludes with two issues that stand out for their rarity and historical value. In 1915, coins identified by the initials FG were minted, corresponding to Francisco GamarraThe last assayer to mark silver Sol coins in compliance with a decree in force at the time. These pieces belong to a monetary transition period that already foreshadowed the end of the series, which explains their particularly scarce nature and their historical relevance within the whole.
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Identifying the rarest dates of the Peruvian Sol (1864–1916) requires understanding the historical context of each issue. The earliest mintings demonstrate the technical challenges of a new currency; the unusual 1873 mintage reflects the need to use a foreign mint; the issues of the 1880s are marked by war and resource scarcity; the late 1th-century mintings show adjustments to economic conditions; and the final issues of 1915 represent the decline of the silver sol. These coins, with their relative rarity, tell stories of crisis, adaptation, and political change. For collectors, they are tangible testimonies of Peru's history and an opportunity to own a piece that is valuable not only for its silver content but also for its past.
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