WRIGHT BROTHERS CACHETS FIRST DAY OF ISSUE
- 75th Anniversary Year of Powered Flight, Artmaster cachet
- Wright's Bicycle Shop in Dayton, House of Farnam cachet
- Wright Brothers Aviation Pioneers, ArtCraft cachet
- Postmarked September 1978 in Dayton OH
- Each cachet has a pair of 31ยข Wright Bros airmail stamps
From non-smoking environment
shelf 76