"The Deutsche Bundespost Berlin (German Federal Mail of Berlin) was the name used on the stamps of West Berlin. It sounds similar to the name of the Western German Mail services Deutsche Bundespost and was de facto a dependency of it. De jure, it was independent and was called Landespostdirektion Berlin. The governmental agency to provide mail and telecommunication services for West Berlin. This civil service agency was in operation from 1949 until 1990." - (en.wikipedia.org 15.11.2019)
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