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The stamp shows us a painting made by the Belgium painter Theo van Rysselberghe (1862-1926) and shows us a man on the helm of a partly visible sailing vessel, while in the background you can see what looks like a barque rigged vessel. Not any information on the ships depict.
More info is given on the painter by Wikipedia: https://en.wikipedia.org/wiki/Th%C3%A9o ... sselberghe.

Belgium 1992 30f sg3132, scott1456.