60 + 40 Kopeks "Help for City Kindergartens", horizontal pair from the lower right corner of the sheet, unperforated proof print on paper without watermark, the right stamp with plate flaw I, mint never hinged, flawless condition, rare, signed by Dr. Rommerskirchen et alia and photo certificate Walter Zirath BPP "The condition is impeccable. Such pairs are rare.", Michel 1. 600.- +