The top Frontiersman/Nemo (with considerable magnification of the picture) reveals that it has the wide grain grey-black micarta scales. I believe that that form of micarta only appeared in 1971-1973. The interesting part is that in 1971 and 1972 they were only made with partially serrated blades. 1973, however had a partially serrated 122 and a plain blade 124. Yours is a plain blade. I cannot make out the stamp at the base of the blade so cannot tell if it was a 1973. Variants have appeared from what I have said above, so it would be interesting to know what the stamp on the blade says. Also, whether it is read with the tip of the blade pointing down or up. If it is just "BUCK USA" it is 1971.
The other knife (again under considerable magnification) appears to have the date stamp, BUCK 124 USA along with a lanyard hole in the pommel and plain edge. That would date it to 1973.
Which knife came with the plastic Nemo diver's sheath?
Also, if I recall, you say you have the boxes for the knives. If so, what does it say on the end of the box for each knife?
A look at some of the
current knives for sale on the great auction site might give you some additional ideas concerning value.
telechronos

