highly unusual richly colored green glazed sullivanesque commercial building terra cotta attributed to kees and colburn

unique early 20th century sullivanesque style exterior minneapolis commercial building terra cotta panel featuring a richly colored mottled green glazed finish. the rectangular-shaped terra cotta panel was fabricated by the northwestern terra cotta company, chicago, ills. information pertaining to maker, location, and date was identified, but architect is not known, although the ornament was likely designed by kees and colburn. the rear cavities and/or webbing have been carefully removed, leaving a flat, displayable panel. only one available.