Stamps with the same design issued in 1989
celebrate the 150th anniversary of the Treaty of London. The stamps
were issued by Belgium (1327) and the Netherlands (750). The Treaty
recognized the independence of Belgium, required Belgium to remain
perpetually neutral, and committed the signatory powers to protect
that neutrality. It also guaranteed Belgium the right of transit by
rail or canal over Dutch territory. And, finally, it divided the
Province of Limburg in two. The eastern part remained a part of the
Netherlands, while the western part was given to Belgium.
The design on the stamp shows the territory of the
Netherlands from the southern IJsselmeer to northern Belgium. The
territory of Limburg west of the Maas River is colored a light orange
and belongs to Belgium, while the territory north of the
Netherlands-Belgium border and east of the Maas is a darker orange and
belongs to the Netherlands.