International commercial airmail cover sent from São Paulo, Brazil to Indianapolis, Indiana, USA, addressed to Atlas Manufacturing Co., Inc.  Franked with a Brazilian commemorative stamp and carried via aérea / par avion in a green-and-yellow bordered airmail envelope.

A solid mid-20th-century example of Brazilian commercial postal history, showing genuine business usage and transcontinental airmail service.  Front and back shown for condition and postal markings.

Exact mailing date not fully legible; estimated mid-20th century based on stamp issue and envelope style.