This was the first of 29 Hammer films directed by Terence Fisher over the course of 22 years. The last was Frankenstein and the Monster from Hell (1974).
Diana Dors receives an "introducing" credit, yet she had already appeared in over a dozen other features.
The bookshop is on Queen Charlotte Street in Windsor, which at 51 feet and 10 inches, is recognized as the "shortest street in Britain".
The £378 John receives from his insurance policy would have equated to about $1,060 at the time or over $10,800 in 2020.
The film takes place in October 1951.