Japanese made plane blade for Stanley #9 1/2 and #220. Laminated with white paper steel edge. Hardness 62 rockwell, thickness approximately 2 - 3 mm, 41.5 x 110 mm, slot width 15.1 mm.
STUBAI - High alloy tungsten molybdenum high speed steel. This is Stubai's premium range with exotic (to Europe) handles anf probably the best grade of HSS used in turning tools.