From the state archives description: "The year-around favorable weather of Miami, Fla., permits Pan Am to do much of its plane service from outdoor work stands. The pioneer, international airline has established the world's largest commercial airline maintenance base at Miami, and services not only clippers from its Latin American division but those from its Atlantic routes as well."
C/n 15928, Clipper Flying Cloud served Pan American from 1949 to 1961.