1973 Sc 4177 Centenary of Latvian Singing Festival Scott 4086

1973. Centenary of Latvian Singing Festival.
Catalogs: Scott 4086, Standard Collection 4177, Mi 4127, Yt 3939.
Condition: MNHOG.
Issued on: May 24, 1973.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 30 x 42 mm.
Colors: Multicolor.
Face value: 10 Russian kopek.
Quantity: 2,600,000.