Based in Auburn, Indiana, the Auburn Post Card Manufacturing Company (later known as the Auburn Greeting Card Company) was a prominent early-20th-century publisher of real-photo postcards. After a 1913 fire, the company expanded rapidly to print thousands of regional and topographical views that documented small-town American life before being acquired by Messenger Corporation in 1932. Before the merger, it seems they visited Washington twice and put out sets of images of the town. Here are the cards that we have knowledge of.
Early set - Late 1900s
Later set - 1930s