The United States’ long-awaited new 100-dollar banknote was unveiled on 21 April 2010. Like the preceding issues of the denomination, it features Benjamin Franklin on the front and Independence Hall on the back, but is protected by improved anti-counterfeiting features, chief among them is Crane’s windowed Motion thread (which the BEP calls “3-D Security Ribbon”) and a copper-to-green OVI metameric pair patch shaped like an inkwell which reveals the Liberty Bell inside when tilted.. The note also has a solid security thread printed USA 100, a watermark of Franklin, the denomination printed in copper-to-green OVI, intaglio printing, microprinting, and a huge vertical 100 on the back right. The new $100 will begin circulating on 10 February 2011 and will circulate in parallel with older versions of the denomination (all US notes remain legal tender forever). More information can be found on the BEP web site, but due to high traffic on the day of its unveiling, some pages may refuse to load properly.