LOUIS XVI - INVITATION to the formal ball held in honor of the marriage of the Dauphin LOUIS (later LOUIS XVI) to MARIE-ANTOINETTE. 1770. Etching. Proof from a 19th-century print run, on vellum paper bearing a drystamp reading “Imperial Museums [... Louvre].” Margins. 25 x 35 cm. Condition B/C (weakened plate impression, trace of water damage on the right margin, rare foxing or small spots in the margins and on the reverse, subject in good condition).