Waterloo Bridge (1931) was Bette's third film. In her autobiography, The Lonely Life, Bette wrote, "Universal, now irrevocably convinced that they had been duped, made the best of a bad bargain and cast me in Robert Sherwood's Waterloo Bridge in which Mae Clarke played Myra opposite Douglas Montgomery's Roy. I was his gentle sister, Janet, who is kind to the hapless heroine. And that was that!" (Davis, 117).
She wore one hat. You can just make out a bow on the band on the right side of the hat.
Bette's performance was not mentioned in the reviews. The film was on YouTube but has been removed twice.
Davis, Bette. The Lonely Life: An Autobiography. G. P. Putnam's Sons, 1962.Ringgold, Gene. Bette Davis: Her Films and Career. Citadel Press, 1966.