Boker penknife USN Seals, black, 01MB856
Black TacKnife of Walther, 50715
This one has me - so I am sorry to say - my least favorite.
The knife has a spring mechanism with which one flips the blade. If the blade is collapsed, it sits slightly askew ... you they need further compress pure ... but is not. But that's ok and type of construction ...
Unfortunately, the blade works by this spring mechanism also quite fast on ... is nothing in your pocket;)
Also it acts contrary to the Black TacKnife very "thin" (the handle, not the blade). Thus, it is - I think - not so good in the hand.
But all in all not bad.
