The Showdown

The entire Arizona to Montana cattle drive was filmed entirely on the Republic back lot using process photography rear projection involving stock footage and newly photographed second unit background scenes.

In the burial scene about halfway through, the term "Gramophone" is used to refer to an Edison-style cylinder phonograph. This is incorrect; "Gramophone" was coined in the 1890s by Emille Berliner to distinguish his new disc-type record players from Edison's. The mistake is a little surprising in a film made only 55 years after the term was coined, at a time when it was still used in Europe to denote then-modern record players. The same misuse of the term later found its way into the "Dark Shadows" series, particularly in the episodes that featured "Quentin's Theme", which played on a similar Edison cylinder phonograph.