Harry places a direct call to a seven-digit number from a payphone. That would not have been possible in the 1950s.
The red-sparkle Premier drums look far too contemporary to have been produced in 1955.
When Angel meets Cyphre in the café near the start of the film, several pieces of contemporary refrigeration equipment are visible. A large freezer unit is fixed to the wall above where Cyphre is seated — a model that was not manufactured until the mid-1970s. The smaller cake display cabinet behind Cyphre also appears to be an illuminated unit with temperature control; such equipment did not exist until the mid to late 1960s.











