CC-90.14 January 1779 United States of North America Continental Currency $4 note. Printed [Philadelphia]: Hall and Sellers, 1779. Serial no. 19269. Printed in black and red. Signed by William Gamble and Jedediah Snowden, both appointed 23 February 1779. Verso with printer's imprint and mulberry nature print. 3 9/16 x 2 3/4 in. 

At the start of the Revolution, the Continental Congress authorized federally issued paper currency, beginning on 10 May 1776. Used alongside concurrently used colony-issued currency, forming a medium of exchange to finance the Revolution. The Congress passed 11 resolutions throughout the war, with the 14 January 1779 Resolution authorizing $50,000,400. These notes were expressly issued to be used in exchange for notes from the 20 May 1777 and 11 April 1778 authorization, which were recalled because of extensive British-sponsored counterfeiting. 

Joseph Breintnall made a series of leaf prints on the press of his friend Benjamin Franklin. The prints notably included both sides of each leaf and were cherished by botanists on both sides of the Atlantic. Franklin worked with Philadelphia printer David Hall, and the leaf prints became a standard feature on the backs of many paper currencies, especially in the mid-Atlantic. When Franklin embarked on his diplomatic career, Hall joined William Sellers and continued to use the botanical prints.  

References:

Bruce Hagen & Stuart Levine. Continental and Colonial Currency. 

Eric P. Newman. The Early Paper Money of America. 

Jennifer L. Roberts. "The Veins of Pennsylvania: Benjamin Franklin's Nature-Print Currency." Grey Room. Issue 69 (2017). 

[Currency, Tokens, Medals,  Numismia, Numismatics, Exonumia, Bonds, Coins, Banknotes] [American Revolutionary War, American Revolution, Founding Fathers, Declaration of Independence, Colonial America, George Washington, Thomas Jefferson, Alexander Hamilton, James Monroe]

Corner repair. Slabbed and graded by Paper Money Guaranty (PMG) as '35 Choice Very Fine".