6 penny yellow olive, yellowish gray paper with diagonal increasing pattern of stripes or streaks, economy gum, line perforation 12 1 / 2, mint never hinged, faultless condition, very rare stamp, signed Busch BPP and photo expertize Jens R. Kunz BPP (2023) \"the quality is perfect. These first in the 90s discovered type of paper counts to the local issue rarities. \", Michel 700.-+plus