From 2005 to 2010 The Philadelphia and Denver Mints produced Special Mint Sets with Lincoln Cents having a satin finish. These have not enjoyed a great popularity among collectors despite having relatively low mintage numbers.

Satin Cent Mintages
YearMintage
20051,160,000
2006847,361
2007895,628
2008745,464
2009784,614
2010583,897

Another interesting fact is that the 2009 SMS coins were made of the old predominantly copper composition.

Lincoln Cent Composition
YearsCompositionGrams
1909-194295% copper
5% tin & zinc
3.11
1943zinc coated steel2.70
1944-194695% copper
5% zinc
3.11
1947-196295% copper
5% tin & zinc
3.11
1962-198295% copper
5% zinc
3.11
1982-201797.5% zinc
2.5% copper
2.50
2009 SMS95% copper
5% tin & zinc
3.11

2009 was a busy year as the mints produced no fewer than twenty different coin variations to be collected:
  1. Philadelphia Early Childhood Business Strike
  2. Philadelphia Formative Years Business Strike
  3. Philadelphia Professional Business Strike
  4. Philadelphia Presidency Business Strike
  5. Denver Early Childhood Business Strike
  6. Denver Formative Years Business Strike
  7. Denver Professional Business Strike
  8. Denver Presidency Business Strike
  9. San Francisco Early Childhood Proof
  10. San Francisco Formative Years Proof
  11. San Francisco Professional Proof
  12. San Francisco Presidency Proof
  13. Philadelphia Early Childhood Special Mint Strike
  14. Philadelphia Formative Years Special Mint Strike
  15. Philadelphia Professional Special Mint Strike
  16. Philadelphia Presidency Special Mint Strike
  17. Denver Early Childhood Special Mint Strike
  18. Denver Formative Years Special Mint Strike
  19. Denver Professional Special Mint Strike
  20. Denver Presidency Special Mint Strike

Click on coins for large obverse and reverse images