The meteorite pistols

These intricately decorated guns were said to have been forged from the iron of a fallen meteorite. They were a gift from the commander of a South American region, which would later become Argentina, to the fourth president, James Madison. "Permit me therefore to present to your Excellency... a specimen of the first essays of the manufacture of arms established in the provinces of Buenos Ayres and Tucuman," wrote General Ignacio Alvarez in an accompanying 14-page letter. Over time, they passed into the hands of Madison's successor - James Monroe - and are now on display at a museum dedicated to him.
Scientists have recently subjected the pistols to a battery of tests to determine whether the story of their origin is correct - and found that they're not made of meteoritic metal after all. Moreover, the intricately decorated handles aren't made of silver, but of an alloy unique to that part of South America at the time. Also, the pistols proved to be fully functioning weapons, not the decorative imitations they'd been presumed to be for so long.