This is a 10¢ orange stamp featuring The Discovery of San Francisco Bay, issued in 1914-15.

This is a 5¢ blue stamp featuring The Golden Gate, issued in 1914-15.

This is a 1¢ green stamp featuring Vasco Núñez de Balboa, issued in 1914-15.

This is a 1¢ green stamp featuring Vasco Núñez de Balboa, issued in 1913.

This is a 10¢ orange yellow stamp featuring The Discovery of San Francisco Bay, issued in 1913.

This is a 2¢ carmine stamp featuring The Panama Canal, issued in 1913.

This is a 5¢ blue stamp featuring The Golden Gate, issued in 1913.

This is a 10¢ orange yellow stamp featuring The Discovery of San Francisco Bay, issued in 1913.

This is a 1¢ green stamp featuring Benjamin Franklin, issued in 1910.

This is a 4¢ brown stamp featuring George Washington, issued in 1910.