An anchor found in Guernsey's Havelet Bay, which may date back to the 18th Century, was put there by a local diver.
The relic was spotted at low tide on Friday and hauled out of the water by the Sarnia work boat.
The location it was found led to suggestions that it may have been lost in the bay before the Castle Emplacement was built.
However, Richard Keen said he moved the anchor there at least 25 years ago.
He said: "A fisherman trawled that anchor up and left it and his trawl outside of Havelet Bay and we went out and recovered his trawl and we lifted the anchor and put it in the bay.
"One day we were going to come back and recover it."
Mr Keen said they had moved the anchor as it would have caught out other fishing vessels.
He said: "It is a fine anchor, off quite a big vessel.
"If you actually swim up and down the Little Russell as much as I have done, there's literally hundreds of anchors have been lost, and anchors bigger, bigger than that one.
"As the law stands now, they have to stay where they are - you're not allowed to recover them unless you have permission from the appropriate authorities.
"Over the years we've recovered quite a few - in fact I had quite a large collection of anchors, quite a few of which I sold two or three years ago."