When Valerie and Luke are driving away from her home after meeting for the first time during World War II, several early 1960's cars can be seen on the rear projection behind them, including a Chevrolet Corvair that didn't appear until the 1960 model year.
During a scene in her bedroom, Susan Hayward is shown using a then-new Princess phone, however the dial does not light up. This was one of the new phone's selling points at the time, which was advertised with the slogan "It's little... It's lovely... It lights".
During lengthy flashback sequence taking place 20 years earlier, none of the three leading characters look any younger than they do in present-day story set in 1964 nor do clothes or hairstyles reflect styles of two decades in the past.