Kritikson Security pens are best known for the check protector feature on the cap. The filler is interesting as well. Twisting the end knob pulls on the end of a curved lever and causes the far side to pivot into the barrel.
![](https://vintagependoctor.com/wp-content/uploads/2020/03/kritikson-patent-snip.jpg)
Kritikson Security pens are best known for the check protector feature on the cap. The filler is interesting as well. Twisting the end knob pulls on the end of a curved lever and causes the far side to pivot into the barrel.