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Antique-collector
Dead pawn jewelry refers to someone converting possessions and artwork into cash. Old pawn is typically old jewelry but dead pawn can be new or old jewelry. The term is usually associated with Native American jewelry.
If their purpose is to preserve the documents for future reference, they would be called an archivist.
Someone who has money handed down in the family is an "heir."Someone who collects old money is a numismatist (currency collector), more specifically a notaphilist (studies paper money, from the term notaphily).
Septuagenarian
A sexegenarian.
centenarian
Young Adult
septa-centenarian
old people
Bibliophilia is the love of the books. A bookwormloves books for their content, or otherwise loves reading in general. The practice of loving or collecting books is dubbed bibliophilism. A bibliophile may be a more common term, book collector.
They would be seventy years old.