1964 Sc 3055-3057. Mountaineering. Scott 2982-2984

1964. Mountaineering
Catalog numbers: Scott 2982-2984, Standard Collection 3055-3057, Michel 3002-3004, Yvert 2899-2901.
Perforation: comb 11½
Color: Multicolor.
Printing: Photogravure.
Print run: 4,000,000.