1969 SC 3692 25th Anniverrsary of Bulgarian Peoples’ Republic Scott 3615

1969. 25th Anniverrsary of Bulgarian Peoples’ Republic.
Catalog numbers: Scott 3615, Standard Collection 3692, Michel 3641, Yvert 3503.
Condition: MNHOG.
Issued on: July 10, 1969.
Perforation: comb 12½.
Printing: Offset lithography.
Size: 32.5 x 32.5 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 4,000,000.