The key, attached to a brass tag stamped "Locker 14 F Deck," was sent to Sedunary`s pregnant widow after his body was recovered.
It had been expected to fetch 50,000 pounds in Saturday`s sale by Henry Aldridge & Son in Devizes, western England.
Prices for Titanic artifacts have soared in recent years. In 2013, a violin believed to have been played as the doomed vessel sank sold for more than 1 million pounds.
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