Being missing overprint 5 Pfg 15 Pfg in dark violet in the horiziontal gutter pair with a narrow vertical gutter in the type combination "IIa/Z/aIa", perfectly mint never hinged/mint (a brand of mint never hinged, the other stamp+ gutter with trace of a hinge), //brief//, 85 and 86, //schön// //pracht// (2012): " ... Upper Silesian rareness 1. urchin. The stamps are genuine and in perfect quality. No signature ".already which one this value is a rareness as a loose stamp and as a gutter pair only further, genuine piece at present is besides this, however, stands for the sale confessed, according to Mr Gruber hasn't hereby he certified this stamp the first gutter pair in his 15-year expertising time! So you have the single possibility of purchasing this piece! Item piece of the rareness in dewy condition! Due to the enormous rareness, gutter pairs of the Michel no. are 10 F not recorded at all! World rarity.