A super rare Euro coin error, this piece is actually two reverses. There is no "heads." One side features a 20-cent design, and the other features a 50-cent design. It's considered extremely rare ...

The reverse side of the coin appears to be the same as a standard euro coin, featuring the map of Europe that is on all €1 coins minted across Europe. Less than 20,000 of the unique €1 coins ...

The 5 euro banknote, like all other euro note denominations, is made of cotton fibre. In 1 euro and 2 euro coins, the "gold" part is an alloy, 75% copper, 20% zinc and 5% nickel.