(Gahagan & Howe) City G & H Express, blue oval handstamp with "423 Washn. St. S.E. Cor. Sansome St.", neatly struck on locally addressed San Francisco cover, Very Fine and choice, a lovely example of this short lived company which delivered mail locally in San Francisco, ex-Clifford, Haas. Estimate  $750 - 1,000. $0 (Image)