1927 Sc O212 Black 8K surcharge on 1925 7K “1905” Stamp Scott 358

1927. Black 8K surcharge on 1925 7K “1905” Stamp. This stamp had never been in normal postal circulation, but was sold at philatelic stores, also exists with CTO cancellations. We have this postally used stamp on the cover.
Catalog numbers: Scott 358, Standard Collection O212, Michel 336B.
Issued on: December, 1927.
Perforation: Imperforate.
Printing: Photogravure.
Overprint: Typography.
Watermark: Yes.
Face value: 8 Russian kopek.