20 Pfennig Flugpost Rhein-Main together with 5 Pfennig Germania on an official airmail card with a special postmark "Frankfurt (MAIN) 14. 6. 12". The airmail stamp, Mi number II, shows the printing error III: "white dot at the bottom of the arch of the P in Pf, field 18". Postal franking to Berlin, very good condition. The card shows a slight trace of adhesive at the bottom. Michel 250.-