This list will help you compile your own 20th century type set!

Lincoln Cent, Wheat Reverse With VDB On Reverse (1909)
Lincoln Cent, Wheat Reverse With No VDB (1909-1917)
Lincoln Cent, Wheat Reverse With VDB On Obverse (1918-58)
Lincoln Cent, Zinc-Coated Steel (1943)
Lincoln Cent, Memorial Reverse (1959-2000)
Liberty Head Nickel (1901-1912)
Indian Head Nickel, Full Mound Reverse (1913)
Indian Head Nickel, Recessed Date On Reverse (1913-1938)
Jefferson Nickel, Normal Composition (1938-1942, 1946-Date)
Jefferson Nickel, Wartime Alloy (1942-1945)
Barber Dime (1901-1916)
Mercury Dime (1916-1945)
Roosevelt Dime, Silver (1946-1964)
Roosevelt Dime, Clad (1965-2000)
Barber Quarter (1901-1916)
Standing Liberty Quarter, No Stars Under Eagle/Bare Breasted (1916-1917)
Standing Liberty Quarter, Stars Under Eagle/with chain mail (1917-1930)
[Additional Note: Standing Liberty Quarter, Recessed Date (1925-1930)]
Washington Quarter, Silver (1932-1964)
Washington Quarter, Clad (1965-1998)
Washington Quarter, Bicentennial Reverse (1976)
Washington Quarter, All State Versions (1999-2000)
Barber Half Dollar (1901-1915)
Walking Liberty Half Dollar (1916-1947)
Franklin Half Dollar (1948-1963)
Kennedy Half Dollar, 90% Silver (1964)
Kennedy Half Dollar, 40% Silver (1965-1970)
Kennedy Half Dollar, Clad (1971-2000)
Kennedy Half Dollar, Bicentennial Reverse (1976)
Morgan Dollar (1901-1921)
Peace Dollar, High Relief (1921)
Peace Dollar, Low Relief (1922-1935)
Eisenhower Dollar, Clad (1971-1978)
Eisenhower Dollar, 40% Silver (1971-1978)
Eisenhower Dollar, Bicentennial Reverse (1976)
Susan B. Anthony Dollar (1979-1999)
Sacagewea Dollar (2000)