1909 S Over Horizontal S Lincoln Cent Wheat Penny Value depends on if the coin is red- red and brown or brown, and in that order (Image examples below). An example in G4 (Good) is worth an average of $75 and an MS64 Red (Mint State) $650, and all other grade values will fall somewhere in between those two.
The S/Horizontal S is called an RPM or Repunched Mint Mark and is the result of the first S mint mark to be punched in the wrong orientation and then correct with another attempt in the correct position. (All mint marks where hand punched into the dies prior to 1990.)
Designer: Victor David Brenner
Diameter: 19 millimeters
Metal content: Copper – 95%, Tin and Zinc – 5%
Weight: 48 grains (3.11 grams)
*Damaged, cleaned or even un-graded (raw) coins will trade for less. Often a damaged or cleaned coin will sell for up to 50% less than listed values.