The Principality of Liechtenstein and Switzerland are celebrating an
important anniversary this year: the customs treaty between the two
countries was signed 100 years ago. Philately Liechtenstein and Swiss
Post are celebrating this occasion with a joint issue.
The Swiss contribution to the current issue is entitled "Relationship" (face value: CHF 0.90) and symbolically unites the two countries with a zip fastener. The motif from Liechtenstein emphasises the historical significance of this long-standing "Friendship" (face value: CHF 1.10) and incorporates elements from the original treaty of 1923.
The treaty on Liechtenstein's annexation to the Swiss customs territory is seen as a key factor in the Principality's economic upswing in the 20th century. Since then, the small state has been part of the Swiss customs territory and the Swiss franc serves as its official currency. In the 1990s, the state treaty was adapted to changing needs. Since then, Liechtenstein has been able to accede to international conventions and become a member of international organisations within the scope of the customs treaty, regardless of whether Switzerland is also a member of them.