Valuing over £1 million (€1.15 million), the collection includes revolvers, carbines, and duelling pistols. Leslie Martin, an Antrim resident who passed away a few years ago, amassed them.

It was dubbed “one of the finest collections of historic firearms ever seen in Ireland” by Bloomfield Auctions.

Manufactured in 1650, the intimidating-looking early flintlock sword is one of the oldest objects up for sale. It belonged to the Hart family from the Donegal/Derry region and was rumoured to have been utilised during the Siege of Derry.

The commander of the Fort of Culmore is said to have been Colonel Henry Hart, who passed away in 1712.

A suggested price of between £45,000 and £50,000 has been assigned to it.

Some highlights are a unique seven-shot revolving carbine made in 1838 and a military-style percussion musket bearing the name of Captain Alan Campbell, who was killed in the 1916 Easter Rising.

Collectors from all around the world are predicted to pay attention to the sale next week.

A “wealth of documentation from his notes to receipts and other documents highlights his passion for detail and his desire to understand each item's background and its role in Irish history,” according to Bloomfield Auctions, who stated that they have worked closely with Mr. Martin's family to fully catalogue the collection.

Karl Bennett, managing director of Bloomfield Auctions, stated that collections “this quality and scope come to auction” infrequently.

Leslie stated, “This collection is a measure of his lifelong passion for his hobby.”

“This is a chance for history buffs to acquire a piece of the past.

“A wider audience will soon be able to appreciate the compelling histories and stories these objects bring to life, as well as Leslie's desire to learn about their owners' pasts.”

Bloomfield Auctions will auction the collection on October 31 at the Culloden Hotel, which is located outside of Belfast.