The Case: The Flagship Gold of the Scandinavian Monetary Union

In 1873, Denmark and Sweden did something remarkable for two nations that had spent centuries at odds: they merged their money. The Scandinavian Monetary Union, joined by Norway in 1875, placed all three kingdoms on a single gold krone standard — coins of identical weight and fineness, legal tender across every border in Scandinavia. The Danish 20 Kroner was the union’s flagship denomination, and the Christian IX “Mermaid” issues, struck in Copenhagen from 1873 to 1900, are the coins that launched it — circulating from Copenhagen to Stockholm to Christiania as seamlessly as a single national currency.

For investors, the Christian IX 20 Kroner delivers the full pre-1933 European gold thesis in one of its most attractive packages. At 0.2592 troy ounces of .900 fine gold — a slightly larger gold content than the British sovereign’s 0.2354 oz — it trades at per ounce acquisition costs comparable to modern bullion coins and tracks directly with the spot price of gold over time, while carrying the historic (pre-1933) designation and the associated insulation against the possibility of future government intervention. At roughly one-quarter of a troy ounce, it also offers divisible negotiability: affording its owner the flexibility to liquidate positions incrementally, in amounts proportionate to the specific needs of the moment and across a variety of circumstances. For investors whose priorities are brilliant uncirculated condition, the celebrated Dania “Mermaid” design, and the deep two-continent liquidity of the treaty-standardized Scandinavian 20 Kroner—all for near-bullion pricing—the Christian IX 20 Kroner stands among the most efficient instruments in the fractional European gold market.

Design & Specifications

The obverse carries the bearded portrait of King Christian IX. The reverse is one of the most admired designs in Scandinavian coinage — the seated figure of Dania, the personification of Denmark, holding a staff with her shield of three lions beside her, a sheaf of grain at her side representing the land’s agriculture, and a dolphin at her feet representing the sea. The design is popularly known as the “Mermaid” — Denmark’s maritime symbol attached to its most famous gold coin, and unique within the Danish series to the Christian IX issues; his successors moved to a crowned-arms reverse.

Each 20 Kroner contains 0.2592 troy ounces of pure gold at 8.96 grams total weight, struck in .900 fine gold to the Scandinavian Monetary Union standard — identical in specification to the Swedish 20 Kronor, and interchangeable with it across Scandinavia during the gold standard era. Minted 1873–1900 at the Copenhagen Mint. Grade range: BU — coins that entered savings rather than circulation, showing the original mint brilliance and design detail as struck.

Christian IX: The Father-in-Law of Europe

The patriarch of the Danish series earned one of the great nicknames in royal history. Christian IX’s children married so strategically that by the end of his reign his descendants sat on or stood beside the thrones of Britain, Russia, Greece, and Norway — his daughter Alexandra married King Edward VII of Britain, his daughter Dagmar became Empress of Russia as wife of Alexander III, and his son George became King of the Hellenes. European royalty gathered at his palace in Copenhagen for family reunions that doubled as diplomatic summits, and the press called him “the father-in-law of Europe.” The 20 Kroner coins bearing his portrait were struck at the height of that influence — the money of a small kingdom whose royal house quietly connected the great powers of the age.

Historical Significance: One Standard, Three Kingdoms

The Scandinavian Monetary Union was one of the most successful currency unions in monetary history — a working single currency area a century and a quarter before the euro, built not on a central bureaucracy but on a fixed weight of gold. From 1873–75 onward, Danish, Swedish, and Norwegian krone coins circulated interchangeably across all three kingdoms because each was, by treaty, the same thing: 20 kroner equaled 8.96 grams of .900 fine gold, wherever it was struck. The union functioned smoothly for four decades and dissolved only when the First World War drove its members off the gold standard — a reminder, useful to gold investors, that it was the gold that made the union work, and the departure from gold that ended it. The Christian IX Mermaid is the founding coin of that system, and its 28-year run makes it the anchor issue of the Danish gold family.

International Recognizability and Liquidity

The Scandinavian 20 Kroner type — Danish and Swedish together — is a fixture of the international pre-1933 gold market. Dealers across North America and Europe recognize the Dania “Mermaid” reverse and the Danish royal portraits on sight, the union standard’s specifications are universally documented, and the type trades actively wherever European gold trades. Because the Danish and Swedish issues share one specification, they form a single deep pool of interchangeable quarter-ounce-class gold — a liquidity advantage few single-country types can match. For investors who prioritize the ability to convert a holding to cash quickly, the 20 Kroner performs that function reliably in both the American and European markets.

The Pre-1933 Advantage: Legal Distinction and Portfolio Differentiation

In 1933, FDR issued Executive Order 6102, requiring Americans to surrender their gold coin and bullion to the Treasury — but the order and the regulations that followed it exempted gold coins of recognized special value to collectors of rare and unusual coins. Subsequent clarifications by the Treasury identified pre-1933 gold coins — a classification that includes the Christian IX 20 Kroner, struck between 1873 and 1900 — as falling within that collector classification as historical items.

Under current constitutional law, a government intervention in the gold market would be executed through the power of eminent domain — the government’s right to take private property for public use provided it pays the owner just compensation. Historic coins complicate the government’s ability to broadly establish “just compensation” or “fair value,” which was precisely the reasoning behind the original “recognized special value” exemption in 1933. That complexity, and the precedent surrounding pre-1933 gold coins, creates a notable impediment to the government’s ability to restrict them broadly — particularly compared to modern bullion, which can be valued easily and consistently at a single price. In essence, it is a bureaucratic question of whether the government would undertake the enormous task of valuing the diversity and complexity of the historic-coin genre — every coin, every date, every condition, every personal holding — and that difficulty is what insulates the owner’s legal liquidity rights in the event of capital controls.

Whether a future government intervention in private gold markets is a risk an investor assigns significant weight to is a personal judgment. The factual point is narrower: the pre-1933 status represents a layer of portfolio differentiation that this coin carries at minimal added per-ounce cost over comparable modern bullion, along with a measure of insulation for the legal liquidity rights of its owner.

For a more in-depth study, we invite you to read our comprehensive memorandum on this subject: Preparing for a Potential Gold Confiscation

Final Thought

The Christian IX “Mermaid” 20 Kroner is the flagship gold coin of one of history’s most successful currency unions — slightly richer in gold than a British sovereign, struck under the father-in-law of Europe, bearing the most celebrated reverse design in Scandinavian coinage, and interchangeable by treaty with its Swedish twin across an entire region. It delivers quarter-ounce-class divisible negotiability, deep two-continent liquidity, and brilliant uncirculated condition at per ounce acquisition costs comparable to modern bullion. No other gold coin can boast this unique combination of so many notable advantages for gold investors.

Mintage by Date

Mintage figures per the Standard Catalog of World Coins, via the NGC World Price Guide. Dates NGC lists without figures are shown with a dash.