ILLINOIS

1911-12:                    Hanson

1913 Type 1:                Greenduck

1913 Type 2, 1914-15:       Adams

1916-17:                    Shonk

1918:                       Hanson

1919:                       Grimm

1920:                       Greenduck

1921 Type 1:                Grimm

     Type 2:                Western

     Type 3:                Hanson

     Non-Pass.:             Greenduck

1922-27:                    Hanson

1928-31:                    Robertson

1932:                       Adams

1933 1-6-digit:             National Colortype

1933 7-digit, 1934-35:      Illinois Prison

1936:                       Hanson

1937:                       Acme

1938-39, 1942, 1943 Truck:  Hemp

1940-41:                    National Colortype

1943-48:                    American Decalcomania

1949-59:                    Hemp

1960-61 Type 1, 1962-63:    Hemp

1960-61 Type 2:             Adams

1964-69 Type 1:             King-Seeley

1964-69 Type 2:             Metal Stamping

1970-72, 1974-75:           Metal Stamping

1973:                       King-Seeley

1976-78:                    Polyvend

1979-84 Types 1-2:          Texas Prison

1981-84 Type 3, 1984-on:    Macon Resources

2001-on:                    Waldale