Some promotional material falsely claimed that the film had been partly shot in Mexico and Guatemala. In fact, the bulk of the film was shot in a Hollywood studio, with the boating shots filmed on California's Santa Catalina Island.
Quentin Tarantino has said that Le iene (1992) was inspired by this movie. The parallels are obvious.
The concept of the holdup, where each member of the gang doesn't know who hired them or who the other gang members are, was also used in Il caso Thomas Crown (1968).
The $1.2 million stolen from the bank would be the equivalent of more than $11.6 million in 2019.