PROJCS["NAD27 / Michigan Old Central",
    GEOGCS["NAD27",
        DATUM["North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.978698213898],
            EXTENSION["PROJ4_GRIDS","NTv2_0.gsb"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4267"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",41.5],
    PARAMETER["central_meridian",-85.75],
    PARAMETER["scale_factor",0.999909091],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["US survey foot",0.304800609601219],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","5624"]]