18 Kreuzer on bluish violet, type I, horizontal pair with single circle postmark "STUTTGART 1 JUN 1856", large margins all around, issue typical a little brightened colour, apart from that faultless, not frequent multiple, expertized Buehler (1970) and Thoma BPP (1989) each with photo certificate as well photo expertize Heinrich BPP (2019) "in total wide above average received pair the colour sensitive stamp! ", Michel 3.000.-