The card has a special large. On board bridged double hand stamp LUFTSCHIFF GRAF ZEPPELIN. Envelope has the special Red.
Brown flight cachet AMSTERDAM 13 X 29 PER LUCHTPOST OVERGEBRACHT. Plus a RED Graf Zeppelin boxed straight line flight cachet. " Mit Luftschiff Graf Zeppelin befurdert". Please see my other items as. Collected over many years they cover a wide range of items from Special Postcards to Stamps and Covers with Franked Post Marked Cancellations defining moments in history.