German Inventions 24K Gold Bar just $5.00 each! This bar commemorates the famous German inventions that have helped revolutionize the world. The obverse and reverse of this 24K Gold Bar features images of famous German inventions. This 24K Gold bar is not an official government issue, but it is a privately minted commemorative issue that is clad in 99.9% pure premium 24K Gold. Each bar comes in plastic snap case to protect it. Photos show front and back views.