Possibly Colibri Pens? Need Help Identifying These

[Gkatona3]

I have three pens I am trying to identify. The have identical clips so I think they may be the same brand, perhaps Colibri. Two of them have the same unusual (smaller diameter) end with threads where the cap screws on while the pen is in use. One is a very dark grayish purple with black mottling (looks like marble). The other looks like it is a very dark wood, almost but not quite black. The third has a traditional tapered end body (with a colored ring)but the cap is a very usual -- four sections separated by silver rings. The body of the pen is silver but the top is various shades of olive green, very dark brown or black, and white.

 

I am attaching photos of all three -- would be grateful for any help...