1978 Sc 4777 World Maritime Day Scott 4654

1978. World Maritime Day.
Catalogs: Scott 4654, Standard Collection 4777, Michel 4727, Yt 4484.
Issued on: June 15, 1978.
Perforation: comb 12 x 12½.
Printing: Offset lithography.
Size: 30 x 42 mm.
Colors: Multicolor.
Face value: 6 Russian kopek.
Quantity: 5,200,000.