Herman E. Fessel
late 1800s
Herman E. Fessel was a scientific instrument maker working in chicago in the 1860s and 1870s. See "Herman E. Fessel," in Charles E. Smart, The Makers of Surveying Instruments in America Since 1700 (Troy, NY: Regal Art Press, 1967), 2:199, for a list of his appearances in Chicago directories.