Block issue "Help for City Kindergartens", proof print on yellowish paper without watermark, format 114 x 153 mm, mint with original gum, the block has a brown spot in the center on the right side, in the lower area there are creases and a circa 9 mm tear with a hinge remnant, the stamps are perfectly mint never hinged, unsigned, very rare, photo certificate Walter Zirath BPP (2015) "...This is a very rare proof print", Michel 5. 000.-