Nikken Sangyo Co., Ltd. in Tokyo made the Blue Ice ice axes around the early 1960s. We do not know the year that they started or the year that they ceased production.
Ice Axes
↑ 363: Blue Ice
Made in Japan [ca. 1962].
800x295 mm.
Weight: 790 g.
Wood Shaft.
Shaft: 32x22 mm.
Fixed head.
Curved adze with a curved edge and no arch.
Adze: 75(l)x63(w)x0(arch) mm.
Straight alpine pick with a negative-clearance chisel tip.