Photo Discovery the Fair! becomes 24.39 24.39, a key event during the Paris-Photo fair, is a Parisian vintage photography fair that brings together dealers, gallery owners, collectors and international experts every year. 24.39 boasts vintage prints spanning from the very beginnings of photography in 1839 to the end of the twentieth century. The fair offers a broad selection of works to discover - both eclectic and varied, sometimes little known, often wonderful, and always surprising. 24.39 (previously known as Photo Discovery the Fair!) has quickly become a must-attend event for professionals and amateurs alike: a unique rendez-vous where the most unusual and distinctive collections are born.