U.S. France Postal Convention of 1857 – 1870 MENU - U.S. - France Mails by Steamship Pre U.S. – France Treaty 1838-1857U.S. France Postal Convention of 1857 – 1870Pre U.S. – France Treaty 1870-1874U.S. – France Postal convention of 1874-1876 Click Images to see Enlarged Panels in Chronological Order from Left to Right & Top to Bottom Back to Top Share the post "U.S. France Postal Convention of 1857 – 1870" FacebookXShare…