"Men of Mach One" - Multi-Signed Cover - Supersonic Flight Pioneers: Ascani, Cardenas, Hoover +
Updated August 6, 2026
| Lot number | 0586 |
| Estimate | $75 - $100 |
| Opening bid | $25 |
| Auction | AMERICA'S STORY: 250TH ANNIVERSARY (PART I) |
| Date | August 11, 2026 at 12:00 PM EDT |
| Auction house | JG Autographs |
| Location | Danvers, Massachusetts |
Details: Commemorative cover honoring the first supersonic flight, signed by four individuals who contributed to the advancement of American aviation and flight research. The cover bears the
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