Germany began issuing distinctive stamps for use overseas beginning in the late 19th century, and the number and variety of issues reached its heyday at the beginning of the 20th century. All German Post Offices Abroad were closed down during or shortly after World War I. It was not unusual for countries to maintain such offices and Austria-Hungary, China, France, Greece, Italy, Japan, Poland, Romania, Russia, the United Kingdom and the United States all did so.In the latter part of the 19th century and into the 20th century, having extraterritorial post offices was one indication of a nation's international power. Stamps from German post offices abroad are popular with collectors and some are quite valuable. The stamp comes from private collection of a German family that lived in China until late 1930s. S tamp is in mint never hinged condition. Study the scan as it form a part of description. I do not post to P. Box, Croatia, Serbia, Slovenia, Bosnia, Montenegro, Macedonia (all of the Balkans). The item "Rare, Airmail China, Black overprint with airplane of German 2,50 mark stamp" is in sale since Saturday, April 20, 2019. This item is in the category "Stamps\Asia\China". The seller is "vvtesla" and is located in Zagreb, default. This item can be shipped worldwide.