Possibly the first widescreen film ever made.
In the early 1980s, world class sports athlete and fight film collector, Jim Jacobs acquired surviving original nitrate print elements of this 63mm film. He took these elements to ASC cinematographer and film restoration specialist, Karl Malkames who designed and built a printer to copy the film to standard 35mm and 16mm formats. It's because of Jacobs and Malkames that these fragments of the film are viewable today.
19th century historical figure Wyatt Earp was a reporter for the New York Herald and wrote extensively on the event, both before and after. Earp was convinced that the film would prove that Fitzsimmons had fouled Corbett by hitting him in the jaw after the knockout blow to the solar plexus, and his outrage that the referee, George Siler, failed to notice this. Fitzsimmons responded to the Herald claiming that having seen the film, he didn't believe a single frame could prove this accusation true. William Barclay 'Bat' Masterson also attended and is oft identified in existing footage as the man wearing a bowler hat sitting ringside at the center of the frame who appears to be manning the bell.
The 62mm film stock was first specially designed to record the fight.
Technically, the world's first feature-length movie. It originally ran 100 or more minutes long. Only 20 minutes of it survive.