1956 Sc 1833-1835 Builder’s Day Scott 1855-1857

1956. Builder’s Day.
Catalog numbers: Scott 1855-1857, Standard Collection 1833-1835, Michel 1864, 1892-1893, Yvert 1826-1828.
Issued on: August 12, 1956.
Perforation: line 12¼. Varieties are exist (comb)
Printing: Photogravure.

Color: Multicolor.
Face value: 40 Russian kopek; 60 Russian kopek; 1 ₽.