Those were sold individually as well as in sets with the same serial numbers and sold thru Moteng out of California to resellers approx 8 years ago or so. As a set they most likely would sell for around $600 and individually possibly a little more but you never know for sure these days. There were I believe 4 different handle variations. Ironwood, stag, buffalo, and giraffe bone.
401 Kalinga . 976 Dagger - and the 916 Bowie
Nice knives