Moving upmarket a bit from the Opinel I recommended earlier, you can try an Enzo PK70. Now discontinued, there is one place I know of that still has it in stock in the Scandi version. Mine is full flat S30V. This knife was designed to beat the stiff UK knife laws. It's a slip joint that takes two hands to open (but VERY secure when open), at 70mm long, the blade falls under three inches, it has a half stop that favors the open position, the handle is adequately hand filling, It can be completely disassembled and cleaned, and the fit and finish is stupendous. It's one seriously nice piece.