Goofs

A guard's uniform is visible in the diner basement during Pino's and McGinnis' talk long before they decided to rob the trucks.

When Tony is visiting Brink's headquarters, he is shown in a medium length shot standing next to a chute. Bags of money start coming down the chute and land on a table at its base, but one of the bags lands on the floor. Next, it cuts to a long shot, but now all the money bags are on the table.

In reality, the gang surprised, bound and gagged five Brink's employees who were counting and storing money. They also took four revolvers from the Brink's employees.

According to information later gleaned from Joseph "Specs" O'Keefe, Joseph "Big Joe" McGinnis was the originator of the heist. He brought in Anthony "Fat" Pino and Stanley "Gus" Gusciora.

Whilst Pino and the driver Banfield remained in the getaway car, seven other men entered the building at 6:55 PM.

The real "Specs" O'Keefe got his nickname for always wearing horn rimmed glasses, but O'Keefe does not wear glasses in the film.

The railroad tracks they walk across are not electrified. Subway tracks that utilize electric power have a third rail.

When they are looking for the candy company safe, they have a scene in the room with tumblers full of different color gum balls. The gum balls in each tumbler should all be the same color, because the color is added in these tumblers, a different color for each tumbler.

The calendar on the wall where Tony and the boys are cracking a safe at the beginning of the movie shows February 1938, but the day numbering is wrong for that month.

The first time the whole group enters Brink's, Tony is showing them around and at one point, for a joke, he tells them that they have to get down and crawl, "like John Wayne in Sands of Iwo Jima (1949)". The Brink's robbery took place in January 1950, Sands of Iwo Jima (1949) was not released until march 1950.

Around 00:33:21, we can hear Guaglione's air on violin, which is first performed in 1956 while this scene is during 1940's.

The packaging for the Buck knife being purchased did not change to the form shown until the 1970s.

In one scene, Peter Falk and his men are shown wearing Brink's hats and uniforms with no indication of how they were obtained.