This week the Baltictech dive-team completed an expedition to the sunken German steamer the Karlsruhe in waters off Poland.
The vessel left Koenigsberg – which is today the Russian enclave of Kaliningrad – in May 1945 before it was sunk by Soviet warplanes.
The ship had been taking part in the sea evacuation in history of more than one million German troops and civilians from East Prussia at the end of World War Two.
Historical records suggest the vessel was carrying a heavy cargo of about 300 tonnes and more than 1000 people.
The Baltictech divers believed the crates could have contained the missing gold-leaf and mirror-decorated Amber Room wall-panels, looted by the Germans in 1941 after they invaded Russia.
But at the end of the expedition, the divers said they had found no sign of lost artwork or treasures, the fate of which remains unknown.
“All the open and damaged chests contained military equipment and the smaller ones were simply private suitcases of refugees from East Prussia,” Baltitech posted on social media.
‘We didn’t touch them, of course, but they made a huge impression nonetheless.
“Everywhere, scattered shoes, belts and private luggage reminded us that nearly 1000 people died on the wreck of Karlsruhe.”
The Amber Room – frequently described as the eighth wonder of the world – was built in Prussia and then given to the Russian royal family in 1716 as a gift.
It was last seen in 1945 during the final months of World War II in a Nazi-controlled Baltic port city.
Following World War II, Russian experts constructed a replica Amber Room in the Catherine Palace in St Petersburg.