The granite column marked "O. Seaquist 1914" tells only part of the story of this building. The Mason Post Office was once located on the site in a wood frame building that burned in 1900. In 1913, Oscar Seaquist bought the site for $3,000 and hired an architect to design a 1-story building. However, a second story was added to accommodate a local lodge needing a meeting place.

Seaquist had a boot shop on the ground floor and judging from the house Seaquist acquired, business must have been good. The Seaquist Mansion is located two blocks to the north on Broad Street. In later years the building housed the First State Bank, which merged with the Mason National Bank in 1932. Thereafter, the building housed a succession of grocery stores until its conversion to an office building. Currently, attorney, Jack Lee has his office in this space.