Hollow Penny
Since 1983 the US penny has been primarily made of zinc with a copper coating in an effort to save money.
While these coins will not hold a micro sd card, they will hold a micro-film or small piece of paper.
Since 1983 the US penny has been primarily made of zinc with a copper coating in an effort to save money.
While these coins will not hold a micro sd card, they will hold a micro-film or small piece of paper.