Bad Zwischenahn (DE)
Bad Zwischenahn (Low German: Twüschenahn) is a municipality (28,596 inhabitants end 2018) in the low-lying Ammerland district, in Lower Saxony, Germany. It is situated on the lake Zwischenahner Meer, northwest of Oldenburg.
Historically in the Grand Duchy of Oldenburg.
Postmark in Unified-Germany
Postmark in German Empire
Postmark in North German Confederation
Since 1 January 1868.