The DVD artwork features a wooden gavel with QB VII carved into it. However, British judges do not use gavels.
Ben Gazzara is about to have lunch in a smart London club in 1946. The exterior establishing shot clearly shows two London Routemaster buses in near close-up even though this bus did not enter service until the late fifties (it wasn't even designed until 1954).
In 1967, we see a London black taxi carrying a 'K' registered number plate drawing up at Abe Cady's London mews house. 'K' plates belong to vehicles first registered in 1971.