The first two series of the Berlin Stamps 1948 and 1949. Full series, signed in Mint mode. Catalog value $ 4,400 ...

The first two series of the Berlin Stamps 1948 and 1949. Full series, signed in Mint mode. Catalog value $ 4,400 The signed series are more expensive because of the Berlin signature.
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.

With the end of World War II in 1945, the Allied Control Commission replaced the German government. Germany was divided into four occupation zones, and Berlin into four sectors; the territories east of the Oder-Neisse were placed under Polish authority. Initially Berlin and the provinces in the Soviet zone issued their own stamps (see Scott # 11N2), but by 1946 "Deutsche Post" stamps were authorized that were valid in the American, British, and Soviet zones.[1] 

West Berlin retained its special status as it remained under the authority of the American, British, and French occupation forces. Thus it continued to issue its own stamps, these stamps became also valid in West Germany on January 1, 1950.[7]