50 Pfennig, dark reddish-brown on light grey-brown, 90th birthday of Prince Regent Luitpold, with an "E" punched through, in Type I, mint with hinge remnant and original gum, very fine condition, slightly creased, two perforations shortened at the bottom left, original perforation from field 5 of the perforation gauge, unsigned, photo certificate Josef Bauer BPP (2024), Michel 2. 500.-, Service stamps of this value in Type I are rare!