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An envelope kept in the Alexander collection was sent at an unknown date from Israel to England. A series of clues that can be found on the envelope allow us to guess the date of delivery and the contents of the envelope.

On October 15, 1851, the post office of the Kingdom of Württemberg in southern Germany issued its first postage stamps.

The process of producing a new stamp involves a series of steps, from the initial idea, through research and preliminary design, to the judicial review of the various committees that examine the stamp. Each of these steps influences the final design of the stamp issued to the public.
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A pair of stamps printed in reverse order, facing each other. The stamps are usually identical, and originate from printing special sheets for the purpose of preparing stamp booklets.

An envelope sent on the island of Trinidad documents an attempt by the local charity to collect donations for the Red Cross during World War I. The course of events turned this activity into a philatelic curiosity.