...unique blend of Art Deco, Greek Revival, and International architectural styles...(Arkansas Historic Preservation Program).
When construction was completed in 1940, Crossett reveled in the addition of the 'pleasing green' stucco building that was designed using a combination of Art Deco, Greek Revival, and International architectural styles. (AHPP)The building cost $70,000 and was finished and dedicated in August 1940--roughly the same time as the lumber company strike of 1940 was polarizing the town, so there may have been less 'reveling' and more revolting going on in some parts of the community.
In terms of design, this is a building built decades ahead of its time. The Crossett Post office was, and still is, a jewel hidden in a small town in Southeast Arkansas. (Old Crossett Post Office named to National Register of Historic Places, Ashley County Ledger).The building housed the post office until 1968 when it was sold by the postal service for $1 to the city for use as a public library. The library was housed in the building until 2002, and now is home to the Crossett Economic Development Foundation. The building is still a "pleasing green." Perhaps that was the nod to Art Deco?