Lot   Cat.#
29 **/*   99 Tb/99 Ka Tb
1923, "Philately for the Labor", inverted silver surcharge "4r+4r" on 5000r violet, vertical pair, top stamp with spaced date "1 923" variety, excellent condition, full OG, NH or LH (top stamp), VF and extremely rare, only block of four and two singles exist with inverted and spaced date surcharge besides this pair, expertized by Dr. Jemtschoujin, P. Buchsbayew certificate, ex-Liphschutz