…s Tower Wyoming (the modern accepted name is Bear’s Lodge, FYI). It gets you Fort Collins Colorado. That’s because the earth isn’t a perfect sphere and there are different mathematical models of the earth called datums and if you use the wrong one, the same coordinates can get you different locations. It’s like if you tried to draw latitude and longitude lines on a cantaloupe and then tried to transfer the markings to a soccer ball- the lumps and irregularities make it hard to come up with a clean, uniform line and the earth is not only locally lumpy but markedly squashed at the poles and a big bulgey at the equator.
Nah, Ben Discoe pointed out that there’s an easier reason why the point lands in the wrong place: user error. There are no two datums so different from each other that they could produce a discrepancy this big and it’s more likely the prop shop people just goofed and used the wrong coordinates for Bear’s Lodge. A more detailed explanation is in the comments.