As of 2023, Kelly's house at 120 St. Germain Ave. in San Francisco is still standing with the same architecture.
First of two B&W films Blake Edwards and Lee Remick collaborated on in 1962 that were set in San Francisco. The other, Days of Wine and Roses (1962), earned Remick her sole Oscar® nomination, for Best Actress.
Several elements of this film inspired scenes in David Lynch projects. To begin with, there is the sign at the beginning of the film which served as obvious inspiration for the title card and setting of Twin Peaks (1990). Also, a bit later, when Kelly is in her garage, the killer mentions that he has "killed twice before"---this is something which "Bob," the supposed killer from "Twin Peaks" also mentions. This scene also has resemblances to a scene in Lynch's Wild at Heart (1990) where Willem Dafoe's character, Bobby Peru, has Lula Fortune in his grasp and is talking to her similarly. Later in the film, the killer is called Garland "Red" Lynch. The resemblance to David Lynch's name is something which the director no doubt noticed, as he also named a character in "Twin Peaks" after him (Major Garland Briggs).
Most of the facts in the baseball game (shown on the ticket stub) are correct---the Giants beat the Dodgers at Candlestick Park on August 18, 1961. Don Drysdale was pitching and John Roseboro catching for L.A. Harvey Kuenn did hit a double, and José Pagán was playing shortstop.
Kelly's car is a 1958 Ford Fairlane 500 Sunliner. Original MSRP was $2,774 ($29,500 in 2023). In excellent condition, at auction, this car could fetch $50,000 or more.