Heinrich Köhler 384 Auction – Day 2 Single Lots & Airmail and Zeppelin Mail – inclusive the collection of the Sieger family

1897-8, 1d. vermilion, upper left sheet corner block of thirty six, showing the  zigzag roulette, with perforation 13 superimposed, watermark Crown Over Q (Type II), hinged in places, leaving most stamps never hinged, bright fresh colour, an impressive multiple of this experimental perforation.