".999 Sterling Silver": What One Slab Label Says About Who You Buy From

We recently bought in a full set of the Royal Mint's 2021 Queen's Beasts quarter-ounce silver proofs: all ten beasts, struck in reverse frosted proof. They are lovely coins. Each one arrived sealed in a slab with a printed label, a hologram, and two words across the top in capitals: Guaranteed Genuine.

The coins are genuine. The labels are wrong. The way they're wrong says a great deal about the difference between a specialist coin dealer and a company that simply markets coins.

Mistake one: ".999 Sterling Silver"

Both sides of the holder describe the coin as ".999 Sterling Silver". That phrase cannot be true of any coin, because it names two different standards at once.

• Sterling silver is 92.5% silver, hallmarked and described as .925.
• Fine silver is 99.9% silver, described as .999.

A coin can be one or the other. It cannot be both. These 2021 quarter-ounce Queen's Beasts were struck by the Royal Mint in .999 fine silver. They are not sterling.

This matters more than it might seem. The Royal Mint has used both sterling and fine silver across its proof ranges over the years, so fineness is one of the details that identifies exactly which issue you're holding. Getting it wrong on a label isn't a cosmetic slip. It is the label failing at its one job.

Mistake two: the face value

The label gives the denomination as £25. Now look through the window at the coin itself. The legend around the Queen's portrait reads ELIZABETH II · D · G · REG · F · D · 50 PENCE. It is a 50 pence coin, and the coin is telling you so.

£25 is the face value of the quarter-ounce gold Queen's Beasts proof, which happens to share the same 22mm diameter. It looks very much as though the specification was copied from the gold coin, and nobody checked it against the silver coin they were sealing in.

Why a label like this matters

None of this changes the coin. It is a genuine Royal Mint proof and a good one. What it changes is how much weight you can put on anything else the holder tells you.

"Guaranteed Genuine" is a claim of expertise. If the people behind the label couldn't read the denomination off the coin in front of them, or didn't know what sterling means, it's fair to ask what exactly is being guaranteed. These holders carry no grade and no certification number we can look up anywhere. They are presentation, not authentication.

That is the gap between a recognised grading service and a decorative slab. NGC and PCGS examine each coin, assign a grade, give it a unique certification number you can verify online, publish population data, and stand behind their work with a guarantee. A display holder can look much the same at arm's length. That is rather the point.

Specialists and marketers

Plenty of businesses selling coins in the UK are, at heart, marketing operations. Their skill is advertising, packaging and the language of scarcity: "exclusive", "limited", "investment-grade". The coins they sell are usually real. Knowledge just isn't the product.

A specialist works the other way round, starting with the coin. In practice that means a dealer who will:

• Describe the coin from the coin: mint, metal, fineness, finish, weight, denomination and mintage, checked against the official specification.
• Use recognised third-party grading, such as NGC and PCGS, and give you the certification number so you can check it yourself.
• Answer a technical question straight away, without a script.
• Tell you plainly when something is wrong, even when it's printed on a label.
• Buy back what they sell, because they know what it's worth.

Five checks before you buy

1. Read the coin, not the box. The date, legend and denomination are struck into the metal. If a label disagrees with the coin, believe the coin.
2. Check the official specification. The Royal Mint publishes the metal, fineness, weight, diameter and mintage for its issues. Thirty seconds of checking would have caught both mistakes above.
3. Verify the certification number. NGC and PCGS both let you look up any certification number online and see the coin's grade and details. No certification number means nothing to verify.
4. Ask one technical question. "Is this sterling or fine silver?" is a good one. A specialist answers immediately. A marketer reaches for the brochure.
5. Watch the language. "Exclusive", "limited" and "guaranteed" with no specifics are marketing words. Mintages, grades and certification numbers are evidence.

Buying from Sovara Coins

Sovara Coins is a UK specialist in NGC and PCGS certified gold proof sovereigns and commemorative gold coins, alongside boxed proofs in gold and silver. We describe the coin you're actually buying. UK delivery is free and fully insured, and if you ever want to sell, we buy coins too.

Browse our NGC and PCGS graded sovereigns, or get in touch if you have a coin, or a label, you'd like a second opinion on.