My collection of Zippy Collectors Club International space covers is shown below. The artist’s signature on the cachet design is ‘Nichol’.

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Skylab 1 / Launch – 25th May 1973:

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Skylab 2 / Spacewalk – 7th Jun 1973:

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Skylab 2 / Welcome Home Astronauts – 24th Jun 1973:

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Skylab 3 / Launch – 28th Jul 1973:

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Skylab 4 / Launch – 16th Nov 1973:

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Skylab 3 / Splashdown – 8th Feb 1974:

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