From the record
“First National Bank of Custer City, in Custer City, Oklahoma, was built in 1903. It was listed on the National Register of Historic Placesin 1985.”
Wikipedia article First National Bank of Custer City, CC BY-SA 4.0.
One of 11 National Register listings published here for Custer County · listed in 1985 · category: Building · built in 1903.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service