I have one marked as yours ,I bought it in the 70's.
You did not mention boxes.
Older (70's)boxes had a looser,fluffier gold velvet type material
inside the box with hinges on the lid.
80's boxes the velvet was not as loose,but still had wrinkles in
the material , box was the same outside as the 70's
90's Kalinga box was two piece no hinges and smooth velvet inside?Wood handles.
Markings on the blade
70's knives were marked upside down
BUCK
KALINGA
USA
with Buck closet to handle on left side of blade
80's - 2005
BUCK
KALINGA
USA
With USA closet to handle