Other mistake: When Charles is buying the car, he says to the dealer, who knows Charles very well, that the phone should be on the left, and the dealer, who knows what's coming, says of course, and agrees that it must be done before delivery tonight. When the car arrives, the phone is still on the right.
The Yellow Rolls-Royce (1964)
1 other mistake
Directed by: Anthony Asquith
Starring: Shirley MacLaine, Ingrid Bergman, Rex Harrison, Jeanne Moreau
Continuity mistake: Rex Harrison is the first to buy the yellow car, but he asks for three changes, the first is to move the intercom phone to the left, but when George C Scott buys the car, the phone is on the right side, not the left.