Recurso: Stamps with control mark as label.
Total circulation of Mi RU 78Ax in all varieties: Mass.
Additional information:
1). Partly 1916 and later yellowish paper, much poorer quality, spots at back projection. Paper structure (back projection) has a vertically oriented rhombic net - "honeycomb". Stamps exist on paper with "Wm K1" along the sheet margin.
2). In 1917-1918 sheets 7x8 were printed, comprising 50 stamps and 6 control letter of “crisscrossing Vs”.
3). Horizontal distance between stamps: 3 mm
4). The later issues appeared with rough, damaged of broken perforations.
