1850 / 54, 2 kreuzer deep black, machine paper, type IIIb, ultra-fine printing, full- to enormous wide margins cut, horizontal strip of three from left margin of sheet (6 mm with needle point), tied by black double circle postmark \"railway station Brno 22 / 8\" (Mueller 337 a), photo expertize Ferchenbauer VOeB (2022) : \"exquisite item! \"