Below are images I've retouched in Photoshop to remove dust and scratches as well as to brighten/darken.

• 
  Kenneth M. Taylor
• 
  Artwork of George Washington & Abraham Lincoln
• 
  Charlton Heston
• 
  Ed Sullivan
• 
  Margaret Gorman
• 
  Pete DePaolo
• 
  Freddie Welsh
• 
  Abraham Lincoln
• 
  James Jabara
• 
  John D. Spreckels