Rififi (1955)
Master director Francois Truffaut called this (original French title Du rififi chez les hommes) the best film noir he'd ever seen. Much to director Jules Dassin's credit, the acerbic Truffaut further qualified his statement, saying it was based on the worst noir novel (written by Auguste Le Breton) he had ever read.
Rififi, loosely translated as 'trouble' in French, is a masterpiece, a film highlighted by a glorious, hushed and dialoguefree safe-cracking sequence -- lasting over 30 minutes -- so incredibly realistic that the French police banned the movie for some time, fearing it might serve as an instructional manual.