From the record
“The Fort Stockton Historic District, in Fort Stockton, Texas, is a 75 acres (30 ha) historic district which was listed on the National Register of Historic Places on April 2, 1973.”
Wikipedia article Fort Stockton Historic District, CC BY-SA 4.0.
One of 2 National Register listings published here for Pecos County · listed in 1973 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service