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| Pioneer 1 launch cover with Goldcraft cachet. |
Pioneer 1 was launched on October 11, 1958, but it was unable to achieve a lunar trajectory due to its second and third stage failed to separate evenly. However, it did manage to returned data on the Van Allen Belt and micrometeorite impacts before re-entering earth's atmosphere on 12 October 1958.
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| Photo: Launch of Pioneer 1 on October 11, 1958. |
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| Pioneer 1 launch cover with Sarzin cachet. |
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| Pioneer 1 launch cover, unknown cachet maker but the cachet is similar to this. |
(Reference from
Pioneer 1)
