Walk into any bullion conversation worldwide and four silver coins come up again and again: the Royal Mint's Britannia, the US Mint's American Eagle, the Perth Mint's Australian Kangaroo, and the Austrian Mint's Philharmonic. We stock all four at Williams Bullion, and buyers regularly ask which one they should choose. The honest answer: you can't go far wrong with any of them. But there are real differences worth understanding before you buy.
What they have in common
All four are one troy ounce of investment-grade silver, struck by sovereign or government-owned mints, with legal tender status in their home countries. All are instantly recognisable to dealers anywhere in the world, which matters when the day comes to sell. And because they're fine silver, they generally qualify as GST-exempt fine metal in New Zealand — see our GST on bullion guide for the details.
Silver Britannia (Royal Mint, UK)
Struck in .999 fine silver, the Britannia carries one of the most storied designs in bullion — Britannia with trident and shield — plus some of the best anti-counterfeit features in the business: a latent security image that shifts between a padlock and a trident, micro-text, and surface animation waves. If security features rank high for you, the Britannia is hard to beat.
American Silver Eagle (US Mint)
The Silver Eagle is the best-selling silver bullion coin on the planet, struck in .999 fine silver. Its Walking Liberty design is a classic, and its US backing gives it the deepest resale market of any silver coin — especially if you ever sell into the American market. The trade-off: Eagles usually carry the highest premium of the four. You pay for that liquidity up front.
Australian Kangaroo (Perth Mint)
The Kangaroo is .9999 fine — technically the purest of the four — and includes a micro-laser-engraved letter visible only under magnification as an authentication feature. Being our closest neighbour's flagship coin, Kangaroos are plentiful and well recognised in New Zealand, and they typically sit at the value end of the sovereign-coin premium range. For Kiwi stackers buying in volume, that combination is compelling — we also stock them in mint tubes of 25.
Vienna Philharmonic (Austrian Mint)
The Philharmonic is Europe's favourite silver coin, .999 fine, with an elegant design featuring the Great Organ of Vienna's Musikverein and the instruments of its famous orchestra. It's the only one of the four denominated in euros. Premiums usually sit close to the Kangaroo's, and its recognition across Europe is unmatched.
So which should you buy?
- Lowest premium per ounce: usually the Kangaroo or Philharmonic — more silver for your money.
- Maximum global resale liquidity: the Eagle.
- Best security features: the Britannia.
- Purity bragging rights: the Kangaroo at .9999.
Many stackers simply buy a mix — there's genuine pleasure in holding the world's great mints side by side, and a mix diversifies your resale options. Whichever you choose, the silver content is identical: one troy ounce of fine silver. Premium and preference decide the rest.
Compare current pricing across all four in our silver collection.
This article is general information, not financial advice. Precious metals prices rise and fall; only invest what suits your circumstances.