Ja, nothing to do with east or west Berlin after WWII.I read this is a reference to “West Berlin” during the Cold War, but that’s an assumption. I had an address in Berlin at one time, but it was so long ago that I can’t even remember if it had a direction incincluded.
Steve's hat box is post, mine is pre, both addresses are in the West area of Berlin. Though Friedrich Strasse would have been in what we know as east Berlin post WWII.