Printed corporate envelope from Gulf Oil Corporation marked POST OFFICE BOX 1559, Houston, Texas 77001. Handwritten name/address and an account number are filled in the upper-left. Cancelled at Moline, Ill., JAN 17 P.M. 1966 with a 5-cent U.S. postage (George Washington) stamp. Cancellation ring shows ZIP digits 49335

Notes for Cover Collectors:
• High-resolution scans of front and back are provided; use zoom to inspect postmarks, cachet details, and backstamps.
• No third-party grading; condition is shown in the images.