It appears that @jermz1 is correct. This is a concealed curved pivot butt hinge (or something very similar to one). Through the magic of FaceTime, I grabbed these shots as @d7onr8 poked around in the cabinet: https://imgur.com/a/RDZEOIs
Looks like the backside of the hinge attaches to the top...
I agree with you, I don't feel it's a special hinge/pivot anymore. It's more the placement of that point relative to where on the lid does it attaches. My crappy drawing on Engineering Stack assumes the pivot is really close to the lid itself, but it feels like it's inset from the lid by some...
What I'm most curious about is how the pivot works. I think the entire lid slides on from the front (there's a bracket that has two tension screws, one that you can see in the image below, and a third that hold it in place) and then the pivot/rotation happens in the area I have circled here...
The details I'm looking for are the lid pivot/rotation, not the monitor (unfortunately this project has two rotations: the monitor and the lid). I believe I have the monitor part working, and the pics that @d7onr8 provided are great (thank you!) and are more what I'm looking for.
I did see that thread. The images aren't terribly helpful unfortunately, but perhaps I could ask the two folks there who have one of these if they'd be willing to help. Appreciate the reminder about that thread.
Wasn't sure where to ask this, apologies if I'm in the wrong forum.
I'm attempting to build my own candy cab-like cabinet, complete with rotatable 25" monitor. I've been using the Q25 as a model and for the most part, it's been super helpful and not impossible to discern ways to make this work...