1 oz Mercury Silver Round

The 1 oz Sunshine Mercury Silver Round

The Mercury round is Sunshine Minting's tribute to the US Mercury Dime, Adolph A. Weinman's "Winged Liberty Head" design minted from 1916 to 1945 and one of the most beloved designs in American coinage. As a private-mint round it carries no face value and no legal tender status, which is exactly what makes it cheap: silver rounds typically run 5-10% over spot, between bars and the 15-25% premiums on government coins. The buyer gets coin-format silver, stackable, countable, capsule-friendly, at near-bar pricing.

What lifts the Mercury above fully generic rounds is the issuer. Sunshine Minting, Inc. (SMI) is one of the largest precious metals refiners in the United States and one of only a few private mints worldwide authorised to supply blanks to the US Mint for the American Silver Eagle and Gold Eagle programmes. That relationship has made SMI products among the most trusted in the private-mint tier, and Sunshine rounds command some of the highest recognition of any non-sovereign silver.

The round's standout feature is MintMark SI, Sunshine's proprietary anti-counterfeiting mark embedded on the reverse of every SMI product. It is invisible to the naked eye; a separate decoder lens reveals the word "VALID", and rotating the lens 90 degrees shows a sunburst pattern. Most private-mint rounds have no anti-counterfeiting technology at all, so this two-step verification, comparable to the Royal Canadian Mint's Bullion DNA, is a genuine differentiator for stackers who buy silver rounds in volume.

Sunshine Mercury Round Specifications

The Mercury round matches common 1 oz sovereign coin sizing, so it fits the same 39 mm capsules and tubes used for Silver Eagles and Maple Leafs.

The obverse shows the winged-cap Liberty figure with left arm flexed forward and right arm extended behind, after Weinman's 1916 dime. The reverse carries the SMI logo with the inscriptions "1 TROY OUNCE" and "999 FINE SILVER", centred on the iridescent SMI eagle that doubles as the MintMark SI security element. The original dime's fasces reverse is replaced by SMI branding, so this is a tribute rather than a reproduction.

Packaging follows the standard silver convention: individual rounds ship in plastic flips, tubes hold 20 rounds, and the outer box holds 500 rounds in 25 tubes. A 1/2 oz version is also produced in the same .999 silver. For authentication beyond the decoder lens, the usual checks apply: precise weight, dimensions, and the magnet slide test, since silver's diamagnetic properties make a rare earth magnet slide slowly down a tilted round.

Tax on the Sunshine Mercury Round by Country

Rounds are taxed like bars, not coins. The coin-versus-round distinction only bites where legal tender status carries a tax benefit, and the Mercury round is not legal tender anywhere.

• US: The primary market. Listed as IRA-eligible by multiple dealers, as a .999+ product from an accredited refiner. No federal sales tax; around 35 states exempt bullion, several use thresholds, and a handful tax it. Long-term capital gains are taxed at the collectibles rate of up to 28%.
• UK: 20% VAT on purchase and no CGT exemption on sale, the same double hit as bars. UK buyers get neither the CGT exemption of a silver Britannia nor any VAT saving, which is why rounds are a niche import there.
• Canada: 0% GST/HST. The federal exemption covers silver refined to 99.9%+ purity, which the .999 round meets.
• Australia and New Zealand: GST-free in both, as the round meets the 99.9% silver purity threshold each country applies to investment-grade bullion. New Zealand has no formal capital gains tax.
• EU: full local VAT at 17-27% depending on the country. The margin scheme that softens VAT on pre-owned silver coins in Germany and the Netherlands does not help here, since rounds are not second-hand coins.
• Singapore and Hong Kong: no tax burden. Hong Kong levies no sales tax or CGT at all, and Singapore's Investment Precious Metals exemption covers qualifying 99.9% silver.

From the 1916 Mercury Dime to a Modern Round

The design this round honours was never actually about Mercury. Weinman's 1916 dime depicted Liberty wearing a winged Phrygian cap, an ancient Roman symbol of freedom of thought. Americans immediately mistook the winged cap for the Roman messenger god's winged helmet, nicknamed it the "Mercury dime", and the name stuck permanently. The official name, "Winged Liberty Head Dime", never displaced it, and Sunshine's round embraces the popular nickname outright. Weinman also designed the Walking Liberty Half Dollar, and his work is considered some of the finest in American numismatic art.

The mint behind the round has its own unusual origin story. Sunshine Minting was founded as TENTEX in Chino, California, the name combining the founders' home states of Tennessee and Texas. It relocated to Coeur d'Alene, Idaho in 1984, was renamed Sunshine Bullion Company, and moved to Nevada in 2025, where it now employs over 200 workers. Along the way it became one of only a few private mints worldwide authorised to supply planchets to the US Mint, the foundation of its reputation in the bullion market.

The MintMark SI security system was a pioneering innovation in bullion authentication, preceding the Royal Canadian Mint's Bullion DNA and similar sovereign-mint programmes. The Mercury round sits within Sunshine's broader line of heritage-inspired designs, which also includes Buffalo and Morgan rounds, a family of products that recycles classic American coin art onto private bullion at a fraction of the premium collectors pay for the originals.

Sunshine Mercury vs Other Rounds and Sovereign Coins

Within the private-mint tier, the Mercury competes with other heritage-design rounds: SilverTowne's Buffalo rounds, Highland Mint's Walking Liberty rounds, and Golden State Mint's Incuse Indian rounds. On metal content they are interchangeable .999 silver. The Mercury's edge is the MintMark SI security feature, which most competitors simply do not have, plus Sunshine's standing as a US Mint planchet supplier. That brand trust costs a little: Sunshine rounds carry slightly higher premiums than completely generic rounds, though still well below government coins.

Against sovereign coins the trade is the classic rounds-versus-coins calculation. A round bought at 8% over spot might sell back at 4-6% over spot, while a government coin bought at 20% over might recover 15-18%. The round buyer gets more metal upfront; the coin buyer recovers more premium at exit. The 1 oz American Silver Eagle adds the strongest US resale demand and legal tender status; the 1 oz silver Maple Leaf adds .9999 purity and Bullion DNA. For pure accumulation, the Mercury delivers more ounces per dollar than either.

Geography matters for the resale story. Silver rounds are primarily a North American phenomenon; in Europe and Asia, sovereign coins and bars dominate and dealers are less familiar with rounds. US buyers enjoy the widest dealer network for selling Sunshine products, while UK buyers face VAT plus CGT with no offsetting benefit, making Britannias or bars the more rational local choice. In the US, where tax treatment is form-neutral, the Mercury round is one of the most popular products in the generic tier for good reason.