Norway 1957 Landscape Set of 3 Postage Stamps Mint Never Hinged

This set of three Norwegian postage stamps depicting the North Cape were issued on May 6, 1957. Colors and values are:

25+10 Norwegian øre - green
35+15 Norwegian øre - red
65+25 Norwegian øre - violet blue

Size of each stamp: 30 x 24 mm
Emission: Semi-Postal
Perforation: 13 x 13¼
Printing: Photogravure