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| A Pioneer "10" launch cover from "SpaceCraft", postmarked at Cape Canaveral with a machine cancel on August 27, 1969, signed by Glenn A. Reiff, the Pioneer Project Manager. The launch vehicle was destroyed after hydraulics in the first stage failed, therefore this fifth (i.e. Pioneer E) program did not receive a numerical designation officially. |
1969-08-27 USA Pioneer E
