Khvalynsk. 1914, 2k dark blue and rose red, horizontal gutter block of 99 (9x6 X 9x5), 4th-6th vertical rows are placed upside down and forming 22 horizontal tete-beche pairs, folded once along upper perforation of the gutter, fresh, full OG with many NH stamps, VF and very rare, with high probability the largest known multiple, ex-Schmidt, Chuchin #4, 4a, C.v. $2,145++, Est. $1,000-$1,500 (Image)