This listing is for the photographed 1861 North Western Bank of Pennsylvania 2 Dollar Banknote. Great piece of history.
Obsolete bank notes are also called "broken bank notes." In the days prior to the Federal Reserve, any bank could produce currency for use by the clients and members of the community. Unfortunately, not many safeguards were taken to ensure that banks stood behind the currency they were producing and circulating. Banks, more often than not, failed and their currency was rendered worthless. As a result, most bank notes of the period did not trade at their full retail value. Oftentimes notes were worth 50 cents on the dollar because the public expected the banks to fail.