From the record
“Deer Springs Lookout Complex is an Arizona Fire lookout within the Apache-Sitgreaves National Forest. It was registered as a national historic lookout on March 4, 2002, and listed on the National Register of Historic Places on December 14, 1987.”
Wikipedia article Deer Springs Lookout Complex, CC BY-SA 4.0.
One of 46 National Register listings published here for Navajo County · listed in 1988 · category: Structure · built in 1923.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service