Twitter Archive | June 22, 2021 | 📸 2/2: photographs: Century Pacific Air Lines SM-6000-B...

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📸 2/2: photographs: Century Pacific Air Lines SM-6000-B tri-motor at San Francisco Airport; July 28, 1931 Transfers 1993.07.17.002 a 2011.032.0103. This tweet was posted on June 22, 2021.