Steel penny cufflinks in the fancy box. These were cast during WWII because of the copper rationing. The steel cent is the only regular-issue United States coin that can be picked up with a magnet. The steel cent was the only coin issued by the United States for circulation that does not contain any copper, and is actually magnetic!
British penny cufflinks. The original reverse of the coin, designed by Christopher Ironside, and used from 1971 to 2008, is a crowned portcullis with chains (an adaptation of the Badge of Henry VII which is now the Badge of the Palace of Westminster), with the numeral "1" written below the portcullis, and either NEW PENNY (1971–1981) or ONE PENNY (1982–2008) above the portcullis.