It's supposed to be 1944, but the first exterior view of the Astor Hotel shows two adjacent film theatres, the Astor and the Capitol, playing We Were Strangers and Scene of the Crime, both of which premiered in New York City in July 1949. A few minutes later, another view shows the Astor playing Melody Time, and the Criterion across the street playing Easter Parade, both of which premiered in June 1948.
When Ann gets out of the cab in front of the Grenville house for the first time, she is a wearing mink coat. She takes out her compact to look at her face. When the shot switches to inside the house, the butler opens the door and Ann is standing there, with the compact in her hand, but the coat is now draped over her shoulders.