Via Lou Lumenick: If you move quickly, you can see the legendarily unavailable Letty Lynton at Youtube. The Siren agrees with Lou on all points. A must for Pre-Code and Joan fans. The Siren and Operator 99 of Allure both watched last night and the movie is quite beautiful, even in this format. Clarence Brown had a very graceful sense of framing, the staging of the climax is unforgettable and there are some breathtaking overhead shots. Plus, Joan at her most beautiful, and if you don't believe me, please also check this set of stills at The Best of Everything: The Joan Crawford Encyclopedia.
Update: It's still there, but you have to look hard and act fast.