Here is a little Imperial Jack that is as close to my first ever slippie as I have been able to find.
My newest Jack, a Texas Jack in CV.
This is my former Jack (now residing across the pond) Alsdorf Teardrop Jack.
Brett Dowell Dogleg Jack featuring ATS-34 and Micarta.
The ubiquitous Swayback Jack. Chestnut bone, CV blades, and worthy of all it's praise.
Tidioute Sheepsfoot/Pen Jack. Red jigged bone and 1095 steel. I like to carve with it.
The peanut. Looks like a little Dogleg Jack to me. This is a sterile Amherst Cutlery dressed in Stag and a mystery stainless steel.
This is a Case/Ruger Pocket Hunter. SS and Stag. I really did not think of these as a Jack, but I think I saw it's daddy in another post here so...
Last, but certainly not least is a working knife for sure. Kerry Hampton built Shadow Lanny's Clip in Linen/Canvas Micarta and etched A2 steel. Badass, I know.