Commemorative Flown Cover Goodyear "Spirit of Akron" - 1988


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#10 envelope with cachet "Cover was flown on SPIRIT OF AKRON GZ22, Test flight #8, 1/9/88, Pilots John Moran & Pat Henry".  Cancelled Mar 24, 1988 on a 22 cent stamp.  Mint, never mailed, with larger transmittal envelope from the Lighter-than-Air Society.