Panama Pacific Exposition. Illustrated all over pictures of President Taft breaking ground and opening exposition and 2 pictures of dignitaries on back of cover with Hotel Colonial, San Francisco, Cal. corner card to New York City, 2¢ carmine cancelled with 1912 San Francisco, Cal. slogan "World's Panama-Pacific Exposition 1915" machine cancel, Very Fine, very rare. Scott No. 375  Estimate $150 - 200. $0 (Image)