“I have never held so much gold and silver in my hand before,” he told the Hannoversche Allgemeine Zeitung paper on Tuesday.
“I didn't think for a second about not handing it in. Only when I was talking about the find was I asked over and over again why I gave it in,” said the 38-year-old.
He said he and a colleague had pulled up an old lino flooring of the kitchen of a flat in Hannover and were clearing out under the kitchen units to make space for tiles, when he found a plastic bag.
“We thought it was a rubbish or replacement pieces of the kitchen which had been stored there,” he said.
But the bag was full of Australian golden coins, gold nuggets stamped with Degussa, and a host of silver coins as well as silver cutlery wrapped in newspaper.
“To find such treasure, it is an odd feeling,” said the handyman.
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He contacted the property management company which immediately got in touch with the dead woman's family. Although there has not yet been explicit talk of a reward for the honest handyman, the family have ensured they got his details, the Hannoversche Allgemeine Zeitung said.