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"An experiment I flew on Von Braun's Jupiter Rocket, 1963"
Otto Berg's 5″ diameter optical quartz piece inset with three threaded mounting points, with tapered edges, measuring 1″ thick. The piece is housed in a blue cardboard box, annotated by Berg: "This is optical quartz—an experiment I flew on Von Braun's Jupiter Rocket, 1963." Whether this is the actual flown piece, or a representative example/flight spare, is not clear. In overall very good to fine condition.