However, early-era serialized employee/test team pieces from the 1980s-1990s B-2 Combined Test Force (CTF) program are highly sought-after military aviation collectibles that command a significant premium among specialized buyers. Challenge Coin / Commemorative Flight Tag. United States Air Force (USAF). B-2 Spirit Stealth Bomber. Serial / Issue Number. Flight Record Slip Info. Air Vehicle AV-3, Flight 217 (June 25, 1997), Crew: Col. Mike Walker & Major J. Schwindt, Mission: OT&E Integrated Sortie #4, Duration: Approx. 1.25 inches (1-1/4). Pre-owned, Excellent / Unopened in Original Sealed Bag with Stitched Flight Detail Tag. Up for sale is an authentic, rare vintage United States Air Force / Northrop Grumman B-2 Spirit “B-2 Team” serialized challenge coin, complete with its original flight card and factory-sealed bag. Key Details & History. “UNITED STATES AIR FORCE? NORTHROP GRUMMAN? B-2 TEAM”. Surrounding a central star with stealth wing motifs. And features custom-stamped serial number. Features the official emblem and text for. “B-2 COMBINED TEST FORCE”. Attached to the sealed pouch is the original paper flight voucher detailing. OT&E Integrated Sortie #4. Coin remains sealed in its original plastic casing. The paper flight tag exhibits light age toning and a minor crease on the reverse, typical for authentic 1990s military paper ephemera. Measures approximately 1-1/4 inches in diameter. A outstanding piece of Stealth Bomber history for military aviation collectors!