1911 Sc J2A For the benefit of the postman

1911. For the benefit of the postman. For use on court mail.
Catalogs: Standard Collection J2A, Michel RU-GK 2A, Yvert RU-ST 2.
Issued on: 1911.
Perforation: 12½.
Size: 21 x 39.5 mm.
Printing: Typography.
Colors: Black, pink.
Face value: 15 Russian kopecks.