Your knives are "Presentation" models manufactured by Gerber in 1971. The pointed handle knives were only made for one year before Gerber modified the design to the flat pommel finger groove handle. The 1971 knives were made in both wood and stag handled versions (the stag is uncommon) and in both stainless and "high speed" tool steel. The H 59 is not a type of steel, but designates non-stainless and Rockwell hardness of "59". The knives were made in 4, 4.25, 4.50, 4.75, and 5.25 inch blade lengths. 400 equals 4 inch blade, 425 equals 4.25 inch, etc. As the pointed version was made only one year, they are much scarcer than the finger-groove models, and do bring quite a bit higher prices.