 The building has an H shape, and has a profusion of typical Richardsonian Romanesque features, included rounded arches over windows and a recessed entry.The focal point of the building is its five-story square clock tower, which is topped by a pyramidal roof supported by tripled round arches on each face.The building was used as a post office until 1936, when a new building on Kearney Square (now the F. Bradford Morse Federal Building) was put in service.