The Zapruder film we see today was created after the fact, presumably at either LIFE or Hawkeyeworks on the weekend of the assassination.
We are going to see presentations trying to convince us the Zapruder film at NARA was part of the in camera original
(only the 6'3" section of z frames 1-486 is exposed out of almost 50 feet of film spliced in 6 places, all else is blank, white, or black as shown in Doug Horne's Film map)
In the original photo spread in LIFE there are images of frames from a film. The frame below is labeled 323, 10 frames after the famous frame labeled 313.
A white dot in the grass had been traveling along with the grass after appearing at exactly frame 313.
LIFE supposedly had the film as early as Saturday mid morning/early afternoon. The next 2 issues contained images from a film which does not match the film shown 12 years later, or the frames we have all seen indiviually.
1st gif is a B&W version of the current film overlaid on top of the LIFE mag print of the same frame. 2nd gif is the same frame but from the color "original" with the dot against the LIFE image without it. 3rd is the actual map of the film from NARA - no side A, no Hesters, no test frames... and finally the singular image from LIFE Mag of frame labeled 323.
More to come...