This is a 30¢ black stamp featuring Alexander Hamilton, issued in 1870-71.

This is a 24¢ purple stamp featuring General Winfield Scott, issued in 1870-71.

This is a 12¢ dull violet stamp featuring Henry Clay, issued in 1870-71.

This is a 12¢ black stamp featuring George Washington, issued in 1861.

This is a 24¢ red lilac stamp featuring George Washington, issued in 1862.

This is a 90¢ blue stamp featuring George Washington, issued in 1861.

This is a 10¢ green stamp featuring George Washington, issued in 1861.

This is a 5¢ buff stamp featuring Thomas Jefferson, issued in 1861.

This is a 3¢ pink stamp featuring George Washington, issued in 1861.

This is a 30¢ orange stamp featuring Benjamin Franklin, issued in 1861.