ca. 1941

[Possible/Probable] Prague [Czech Republic]
Commentary from other sources:
1) “Following an announcement by the Ministry of Finance Jews were encouraged to deposit their stamp or other collections in their name with a foreign exchange bank, at the latest by 15.03.41. A stamp collection is not only a collection for the purpose of philately but also a stock of stamps. The announcement does not apply to Jews of foreign nationality or to those non-Jews married to a Jewish spouse in a mixed marriage.”
“Nazi Restrictions on the Jews of Prague & The Role of the Jewish Community Council,” Holocaust Education & Archive Research Team, Accessed 8/27/2015