Quote:Very Austrian in appearance.

That's because until January 1921 the Austrian Post handled mail for
Liechtenstein and the country also used Austrian currency, Heller & Kronen.
On the stamps is written
K. K. Österreichische Post im Fürstentum Liechtenstein =
Imperial and Royal Austrian Post in the Principality of LiechtensteinSince then the Post Office has been administered by Switzerland but many stamps
especially engraved were still printed by the Austrian State Printer, Vienna