This ArtCraft Official First Day Cover features a block of four 13¢ US Bicentennial stamps commemorating the French Alliance of 1778, postmarked in York, PA on May 4, 1978—the exact date the treaty was ratified by the Continental Congress.
The Treaty of Alliance was a pivotal agreement during the American Revolutionary War, securing French military and financial support that proved decisive in the colonies' fight for independence from Britain. Its bicentennial in 1978 was marked with this striking stamp issue.
The cachet illustrates the historic ratification scene in York, while the stamps themselves depict the signing of the treaty documents between American and French representatives.
A fine addition for collectors of Revolutionary War postal history, bicentennial issues, or ArtCraft cachets, this cover remains in excellent, fresh condition with a clear first-day cancel.