Lot 51611 – RUSSIA 1917 1R imperforate, 2 complete double sheets w.gutters and shifted colour

1917 1R in 2 complete horizontal double sheets of 112 (including each 12 decorated fields) with large horizontal gutter (16 gutters), showing also different colour shade of brown printing, both with progressive stronger getting colour shift of red orange print of eagle & value, never hinged, very fine, Standard 152 var., Zverev & Gilmanov 139 var., Liapin 148 var.