While the Origami watch itself has no 3D printed components, it was prototyped using 3D printing (which is fast becoming an industry standard in modern watchmaking in general).
To make the model a reality, however, he needed people who could create the various specialty components he needed and, of course, a movement to power the thing. During a trip to Baselworld earlier this year, Pettis meet with the folks at Eterna and ended up sourcing the caliber 3909a, a sturdy workhorse of a time-and-date movement with a 65-hour power reserve. (The movement is part of the Eterna Caliber 39 family; HODINKEE contributor and watchmaker Aaron Berlow took a close look at its technical features in an article in 2015.) More at Hodinkee.
Love the spirit behind this watch. Hate the watch and the price.