I was reading the Germany: Cancellation Premium thread and came across PostmasterGS' reply regarding the Reichspostdienstflagge machine cancel. Here is the link to his reply: http://goscf.com/t/8094&whichpage=8#447752
I have had three examples in my collection awaiting identification.
The first stamp is Germany Scott 67 and seems to have been canceled using the Columbia machine in Berlin.
The second stamp is Scott 82h (pre-war printing) and was also canceled by the Columbia machine.
The third stamp is Scott 65C and it seems to have been canceled by the Behling & Lubke test machine in Berlin. I base this on the shape of the tassels and comparing to the images provided by PostmasterGS.
I'd like to hear what others think about my identifications, and anything else related to this cancel.