A gigantic gold coin made for Spain’s King Philip III in 1609 has become Europe’s most valuable coin after selling for more than £2.6 million at an auction in Switzerland.

Of course, if you think you have any rare or high-value coins in your possession, your best bet is to take them to a professional collector to get them evaluated. And there are some coins that they ...

You may not realise that these old coins could be worth a small fortune - but only if they're from certain eras ...