Background
The ninth Postal Union Congress was opened in London on 10 May 1929,
with special stamps released on the opening day. The Congress was one
of the four-yearly formal meetings of the Universal Postal Union and
was attended by representatives of most of the world’s major postal
authorities.
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Initial plans were to issue ½d, 1d, 1½d and 2½d values, with a £1 value
added later on. The £1 stamp may have been to boost the low value of
the set of stamps to be presented to delegates, or may simply have been
to generate income to offset the cost of staging the Congress.
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