50 Dollars F102A Delta Dagger

The Convair F-102 Delta Dagger was the United States Air Force's first operational supersonic interceptor, but its path to service was nearly a catastrophe. The initial YF-102 prototype failed to break the sound barrier in level flight — a fundamental embarrassment for a jet designed explicitly to do so. Area ruling, a then-novel aerodynamic principle developed by NACA engineer Richard Whitcomb, was hastily applied to the fuselage, producing the distinctive "wasp waist" that finally made supersonic flight achievable.

The Marshall Islands issued extensively in silver through the 1990s, targeting the commemorative collector market rather than circulation.