This was a few weeks ago now, an eBay purchase of a 1900 gold sovereign that didn't feel right. The coin was ever so slightly larger in diameter but the strike and the details on the coin looked pretty legit. The weight was pretty much spot on too, so simply measuring the weight would not have been able to pick up this was a dodgy coin.
Put it on the trusty Harrison and sure enough, it didn't sit flush on the scale due to its larger diameter. It also didn't fit through the slot as a result.
Holding the coin up against a genuine sovereign is also very telling, the diameter doesn't match up, and the edging was also not quite the same as the number of dents in the milled edge don't line up either.
I would definitely recommend anyone who is into gold sovereigns (and half sovereigns too as these can perform the same test on the halves) to get one of these. The concept is very simple and will likely save you lots of trouble and hassle in the long run and on this occasion it definitely saved the day.
The coin was returned to the eBay seller, with a free return postage provided, and I got a full refund.
Dodgy sov not sitting flush

And not fitting through the slot either

Compared to a genuine one that tips the scales without bottoming out and sits flush

Put it on the trusty Harrison and sure enough, it didn't sit flush on the scale due to its larger diameter. It also didn't fit through the slot as a result.
Holding the coin up against a genuine sovereign is also very telling, the diameter doesn't match up, and the edging was also not quite the same as the number of dents in the milled edge don't line up either.
I would definitely recommend anyone who is into gold sovereigns (and half sovereigns too as these can perform the same test on the halves) to get one of these. The concept is very simple and will likely save you lots of trouble and hassle in the long run and on this occasion it definitely saved the day.
The coin was returned to the eBay seller, with a free return postage provided, and I got a full refund.
Dodgy sov not sitting flush

And not fitting through the slot either

Compared to a genuine one that tips the scales without bottoming out and sits flush

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