1 kreuzer large shield, green (2) in mixed franking with 7 kreuzer large shield blue as correctly franked on cover from single circle postmark "FRANKFURT A. M. 7 / 5 74" to London / England with arrival postmark, cover defects from opening the cover, photo expertize Krug BPP (2018) "all stamps are fresh colors, good embossed, well perforated and in perfect condition. Unusual franking combination from known correspondence. "