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. "