[Letter and first flight air mail cover addressed to William E. Boeing and Bertha Boeing from J. Parker Van Zandt, May 10, 1937]

Letter to William E. Boeing and Bertha Boeing from J. Parker Van Zandt, May 10, 1937. Sends greetings and hopes this will be added to Boeing's first flight collection. One handwritten page with first flight air mail cover.

Stamped cachet: "Primeiro Voo – Correio - Transpacific - Macau-USA."