A Swedish team of exploration specialists have rescued a cargo of century-old old cognac and liqueur belonging to Russia's Tsar Nicholas II.

Dennis Aasberg of Ocean X, the team behind the salvaging operation, showed off his haul in Bammarboda, just outside Stockholm, on Monday.

The bottles were recovered from Swedish steamer S/S Kyros in October and include a 'De Haartman & Co' cognac and 'Benedictine' liqueur.

The mission was carried out under "difficult and dangerous" conditions, according to Aasberg.

Divers had to work at a depth of 77 meters (252 feet) in international waters between Sweden and Finland.

Reports suggest the cargo could fetch up to $6 million (€5.5 million).

The ship and its precious cargo - 50 cases of cognac and another 15 cases of liqueur - set sail from France and was destined for St Petersburg in 1917, the last throes of Tsarist Russia.

It was sunk en route by a German U-Boat and the shipwreck remained undiscovered until 1999.

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