Issue: December 1908.
In 1908, stamps of the Eighteenth Standard Issue of postage stamps of the Russian Empire were issued with a new design for denominations from 1 to 10 kopecks. The remaining stamps kept the previous design. A new paper was developed and used for these stamps: without a watermark, but with a special chalk rhomboid grid. This was done to prevent forgeries.
Sheet.
Issue with chalk grid, perforated. 1st printing. 1908–1912 (Watermark at the top and bottom of the sheet; paper with horizontal honeycomb pattern).
1 Kopeck 1908.
18th Issue Russian Empire.
