OFFENBACH 12. 6. 12, airmail stamp 10 Pfg with plate flaw "foot of the T in German split" (field 14) together with 5 Pfg Germania with Perfin "F&C" (O. Fritze & Co., Offenbach) on officially airmail postcard, ribbed box, with a lot of blurb to a business acquaintance to Ingolstadt