1926 Sc O135 Worker Scott X

1926. Worker. This stamp had never been in normal postal circulation, but was sold at philatelic stores, also exist with CTO cancellations.
Watermark: 11b/170.
Catalogs: Scott not listed, Standard Collection O135, Michel 275IBX.
Issued on: July, 1926.
Perforation: Imperforate.
Printing: Typography.
Face value: 5 Russian kopek.