First day covers are stamped envelopes that are postmarked on the first day of the stamp's issue. This set of health stamps on a first day cover from 1950 featured Princess Elizabeth (who became Queen Elizabeth II in 1952) and her son Prince Charles, who had been born in 1948.
Courtesy of New Zealand Post
Using this item
Private collection, Carl Walrond
Reference: 1950 Health Stamp stamp issue
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