Front:
tnited ir Lines
UN
Back:
Please address
and return to
stewardess who
will stamp and
mail for you ...
POST UNITED
AIR LINES
Mail and express is put aboard Uniteds'
4-engined 300 mile-an-hour Mainliner. In the
"Age of Flight" these planes will streak across
the country carrying 52 passengers and 5500
pounds of cargo.
