For information: here's a Mail I found in an old thread about tht Nighthawk.
Haebbie
I am not sure what it is that you are asking? I'll type some more though and see if I answer your question. ;-) I know that we would not have started a production run through the shop in anticipation of a military contract. The contract would contain info pertinant to the manufacture so there is no way we would have started without one.
The 650 came out about 2 years after we changed from 425mod to 420hc. So why does the catalog say it was made of 425mod in 94 and 95? In the 96 catalog it doesnt mention the steel type and we can surmise that in 96 they were made of 420hc. I might be able to find someone here that remembers the project and can shed some light. In the meantime, my theory is that when we pitched the idea of the 650, the steel type made sense for the military's aplication. Even though they did not pick the 650, when we went to production of it we decided that we would keep the same steel type since it made sense for the military and it could be a marketing point that the knife met a majority of their requirements. After a couple of years we switched.
Another possibility is that we had a boat load of 425mod in the proper thickness and decided to use it all up on the 650.
Either is possible and they may both be true.
I hope this helps.
Joe Houser
Director of Consumer relations Buck Knives Inc.
Buck Collectors club Liaison, Member #123