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June 16, 2025I’ve been collecting coins for as long as I can remember, and there’s something about big, heavy gold and silver pieces that always grabs me. They’re more than investments; they’re history you can hold. Over the years, I’ve hunted down some real giants—commemorative issues, classic rarities—and picked up a few insights along the way. Today, I want to share some of the heaviest hitters in my collection and pass on some tips I’ve learned about keeping them in top shape, getting them graded, and what to watch for in the market.
Massive Gold Coins That Amaze Me
There’s nothing like the weight of a massive gold coin in your hand. I’ve been lucky enough to handle a few that really take your breath away. Take the 5 Sovereign coin, for example—just under 40 grams (39.90 to be exact) and often called one of the heaviest circulated gold pieces. But my heart belongs to the 1990 Isle of Man commemorative, struck for the 150th anniversary of the first postage stamp. It’s a solid 5 ounces of gold, minted in high relief by Pobjoy Mint, and it perfectly captures the look of the Black Penny stamp. Rumor has it only about 120 were made, making it a rare centerpiece for any collection. Then there’s the 1969 Uganda 1000 shillings proof coin from the Pope Paul VI visit set—a whopping 140 grams and 70mm across! It’s a reminder of how politics can shape coinage. And I can’t forget the classic 1787 AV 10 Zecchini from Bologna Mint under Pope Pius VI. At 36 grams of .986 gold, it’s a masterpiece of old-world craftsmanship. Though I have to laugh—its name sometimes makes people think it’s a vegetable!
Silver Giants That Impress
Silver giants pack a visual punch that’s hard to beat, and they look fantastic in a display case. My heaviest is the 2013 GB 10 pound Britannia (first release), slabbed as PF70UC by NGC—a full 5 ounces of silver that never fails to impress. But the coin that started it all for me was the 1974 Panama 20 Balboas from Franklin Mint. I bought it as my first ‘serious’ coin, and at nearly 130 grams and 61mm, it’s a beast. It came in a protective box that’s kept it from toning for almost 50 years now! That taught me a lesson: sealed trays or capsules, like the ones Franklin Mint used, are silver’s best friend. They keep coins pristine, which is why mine still looks fresh. I’m also partial to my 1614 2T silver coin from Hall in Tyrol, graded AU53 by NGC. At 58.2 grams and 41mm, it’s a testament to the mint’s skill. And for pure size, you can’t beat monsters like the Sao Tome 3500 dobras (4 ounces, 63mm) or Equatorial Guinea’s 7000 Francos (16 ounces!) and 15000 Francos (a full kilo, 32 ounces). They’re huge, but the details in their designs are just stunning.
Practical Collecting Insights and Tips
After years of collecting these big boys, I’ve picked up some tips on keeping them safe and sound. Protection is key. If your coin comes in original packaging—like Franklin Mint’s trays or a grading slab—leave it there. I’ve got coins that have stayed toning-free for 45 years because of that, and it makes a huge difference when you’re after a high grade. Stick with inert plastics for storage; they’re the safest bet. When it’s time to get a coin graded, I always go with NGC. Their authentication is top-notch, and for heavy coins, they check the weight and dimensions to confirm details like the .986 gold in older coins or the exact silver weight in modern ones. On the market side, coins with low mintages—like that Isle of Man piece or the Franklin Mint sets (about 21,000 proofs made)—tend to do well because collectors want them. And one more thing: always double-check the weight and size when you’re buying. I keep a good scale handy because even a small difference can mean trouble.
Fun Anecdotes and Reflections
For me, collecting these giants is as much about the stories as the coins themselves. Like the time I took my 10 Zecchini to a coin club meeting. One guy thought it was named after a zucchini! We had a good laugh, and I got to share a bit of Italian coin history. That’s what I love about this hobby—it connects people across time and place. When I look at coins like the Hall Mint pieces, I’m amazed at how beautiful they are, even after centuries. Big doesn’t mean bulky; the artistry is still there. And whether it’s the rush of opening a perfect proof or the chase for a rare heavyweight, these moments keep me hooked. If you’re new to large coins, I’d suggest starting with something like the Panama Balboas. They’re affordable, impressive, and a great way to dive in.
Hunting down these massive coins has only made me love numismatics more. They’re a perfect mix of history, art, and solid value. Now it’s your turn—what are your favorite heavy coins? I’d really enjoy hearing about them, so leave a comment below!