From the record
“The Donald Beckon Ranch, near Zeona in Perkins County, South Dakota, United States, was built in 1910. It was listed on the National Register of Historic Places in 1987.”
Wikipedia article Donald Beckon Ranch, CC BY-SA 4.0.
One of 19 National Register listings published here for Perkins County · listed in 1987 · category: Building · built in 1910.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service