Factual error: The records played in the fairground sequence "Sealed with a kiss" by Brian Hyland and "Runaway" by Del Shannon date from the early sixties, while this part of the film is set in 1959.
Factual error: While all the main characters in this film are correctly attired for when the film is set (the sixties) the extras clothes and hair styles are current from when this film was made in 1973.
Other mistake: When Terry visits Jim in his grotty room, Jim pulls out his Buddy Holly LP and tells his friend he's been waiting months to hear it. When he places it on the turntable, and plays it, what comes out is 'Donna' by Richie Valens.
Factual error: Towards the end of this film when Jeanette is talking to Jim while he is working on his van, a modern red convertible car drives past them in the background.
Suggested correction: This is too vague an entry, what model and year is the car seen? I certainly couldn't identify it. The scene is seems to be set in the early 60's, so what do you consider a modern car when this is a 1973 film.