Numismatics: zodiac series in copper, silver and gold

Numismatics: copper sneaks into investment portfolios

A 1-ounce copper zodiac series with an Antique Finish, a mintage of 2,000 units, and its silver (500) and gold (99) equivalents with engraved serial number and numbered certificate. That is the starting point of a forum thread in which one participant argues that the weight and price of the metal hardly matter. What counts, according to that view, is the rarity, the finish and the story told on the reverse. The thread has accumulated pieces in a wide range of metals, from copper and bronze to gold and platinum.

Copper, bronze and nickel appear in the catalogue alongside platinum. The logic defended in the thread is simple: if a 1-ounce antique-finish copper coin sells above its metal value, the collector is paying for the design, not for the raw material. And that is where limited mintages, numbered certificates and thematic series come in.

Zodiac series and finishes that multiply the price

The 2015 Zodiac series is the most frequently cited example. One ounce of copper with an Antique Finish, a mintage of 2,000 units, coexists with 500 units in silver and 99 in gold. The serial number engraved on the coin and the numbered certificate of authenticity are the hook. The thread also mentions pieces such as the 2017 Canadian $100 grizzly bear, a majestic 3D animal sculpture, or Benin's 2014 Romeo and Juliet, one ounce of silver.

Some argue that the real value lies in the mintage. 99 units in gold versus 2,000 in copper is no small difference: it is the boundary between a collector's asset and a mass-market product. The antique finish, which imitates the wear of time, adds a layer of artifice that some consider a trick and others pure marketing. The discussion, in any case, is not about metallurgy.

From historical silver to silver-plated steel

The conversation has also touched on the opposite extreme: reproductions of silver coins made of silver-plated steel. They do not match the size or weight of the originals, and the coin itself does not state weight or purity. Those who sell them say so openly: they are reproductions, not counterfeits. The ethical debate is served, although the practice has become normalized in the market for thematic rounds, especially in series inspired by Egypt, such as Anubis and Cleopatra.

At the other end, historical pieces that trade on their rarity. The 1887 Congo Free State 5 francs, with 25 grams of 0.900 silver, has sold for $446. A Swiss 5-franc coin from 1861, with a mintage of 6,000 units, reached $230. The collector's logic prevails: the harder to find, the more expensive. And the more expensive, the easier to counterfeit.

The problem of counterfeits and outdated catalogues

That is the most uncomfortable point. The 1969 Biafra 1-pound coin, with the crowned eagle, is a recurring example. According to one participant, the Krause catalogue stated a weight of 19.76 grams for years; in its 42nd edition it corrected it to 25.6 grams. It is a coveted piece, with prices that never fall below 200 euros, and precisely for that reason it is one of the most counterfeited. The original mintage is not known exactly, and there seems to be more than one variety. The collector who buys without certification assumes a risk that no catalogue eliminates.

The series of Chinese 5-yuan coins from the 1980s, with 22 grams of 0.900 silver, dedicated to inventors, philosophers and poets, shows another side of the market: institutional production with a proof finish and historical themes. Cai Lun, Zhang Heng, Lao-Tse or Kublai Khan appear on pieces that are now sold as part of a complete series, not as individual coins. The strategy is the same as the zodiac's: create collectors, not investors.

What determines the price of a copper or bronze coin?

The price of a copper or bronze coin with a special finish does not depend on the metal. It depends on the mintage, the finish, the theme and the existence of a numbered certificate. An ounce of copper is worth a few cents on the commodities market; the same ounce turned into a collectible piece with a mintage of 2,000 units can multiply its price twenty or thirtyfold. The key lies in collector demand, not in the copper price.

That explains why 10,000 Congolese franc coins with 1,000 grams of silver and malachite, dedicated to Angkor Wat, coexist in the same conversation with 25-pence pieces from Ascension Island from 1981. The price range is so wide that any generalization fails. What unites them all is the logic of the unique object: if you cannot have the original, you have the reproduction; if you cannot have the gold, you have the copper with the same design.

The Spanish collector and the 2,000-peseta coin of Charles V

In the Spanish market, the 2,000-peseta series from the year 2000 in proof, silver, commemorating the fifth centenary of Charles V, with a mintage of 15,000 units, is an example of how an institutional issue can become a collectible. The 10,000-peseta piece from the same year completes the series. They are not rare coins, but they are sought-after ones, and that is enough for their price to detach itself from the metal value.

The conversation has drifted toward pieces of all kinds: from the 1989 Canadian dollar dedicated to the Mackenzie River to the Mexican peso of Maximilian's Empire from 1867, including the 1863 Guatemalan 1 peso or the 1861 Swiss 5 francs. The geographical diversity is enormous, and so is the diversity of prices. There are coins that sell for 20 euros and others that exceed $400.

The question nobody answers: investment or collection?

The boundary between investment and collection is blurry. A copper coin with an antique finish is not a financial asset: it does not trade, it cannot be sold at any moment and its liquidity depends on finding another collector willing to pay. But it is not just a decorative object either. The zodiac series, with its 99 gold units, has a scarcity component.

The problem is that the modern numismatics market is flooded with issues with artificially low mintages. Every year dozens of new series appear, each with its certificate and special finish. Scarcity, when manufactured on demand, ceases to be scarcity. And that is where the experienced collector begins to grow suspicious.

The conversation has reached no conclusion. The pieces keep piling up, the series keep multiplying and prices keep depending on factors that appear in no catalogue. How much is an ounce of copper with an antique finish really worth? Whatever someone is willing to pay for it. No more, no less.