Released back in 2005, the limited edition €1 coin is currently on sale on online shopping website Etsy for as much as €900.

While the coin appears to be the same as a regular €1 coin on one side, the other side boats a Celtic harp, a symbol directly linked the country’s music history.

 Written on the right side of the harp is the word "Éire", which translates to "Ireland" in Irish, as well as the year the coin entered production, 2005.

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 were produced 19 years ago, leading to it becoming harder to find as its 20th anniversary approaches.

The Etsy listing reads: "The 2005 1 euro coin from Ireland features the Celtic harp, a symbol deeply rooted in Irish culture and history.

"This coin, struck in a copper-nickel alloy, is a testament to Ireland’s rich heritage and its integration into the broader European community."

The 2005 coin listed on Etsy.

The 2005 coin listed on Etsy.

Adopting the euro in 2002, three years after it became the currency of all of the countries in the eurozone, Ireland had been had been using the Irish punt from 1979.

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Due to the coin being made of a copper-nickel alloy, a material common in the production of euro coins, it’s likely a lot of people has gotten rid of them without even realising it.

Coin collections have been on the rise over the past decade, in part because of fewer physical coins being produced as the world moved towards using online financing as their main source of payment.

Whether you choose to keep the coin or sell it for a small fortune online, you might just have a piece of Irish history stored in an old piggy bank or down the side of your couch.

* This article was originally published on Extra.ie.