1991 Sc 6237-6239 Russian America Scott 5971-5973

1991. Russian America.
Catalogs: Scott 5971-5973, Standard Collection 6237-6239, Michel 6181-6183, Yt 5840-5842.
Condition: MNHOG.
Issued on: March 14, 1991.
Perforation: frame 12 x 11½.
Printing: Photogravure.
Size: 55.5 x 26 mm.
Colors: Multicolor.
Face value: 20 Russian kopek; 30 Russian kopek; 50 Russian kopek.
Quantity: 2,500,000; 2,200,000; 1,900,000.