Bought #4-4.5 just now
The handle and the stone is clearly not original,
It can be sent to James Behring, or maybe not.

I wonder what it is the year of release?
I have a model 8-4 with the same form choil,
so I guess the knife production in 1970 +/- 3 years.
But I can not say for sure, and I ask the board
of experienced collectors Randall