Zebra Sharbo X LT3
Aluminum 2+1 twist activation multi-pen. The twist action is continuous rotation without a stop. The pen body comes empty without refills. Both the ink and the pencil component need to be purchased separately. Ink refills won’t fit in the spot made for the pencil.
Variants: Range of colors and finishes. The Sharbo family of pens has three different versions. The fancy version has one more ink slot that makes it a 3+1.
Refill is D1. There are slight diameter differences between Japanese and European D1 refills. I’ve heard these differences can be an issue for certain models of this pen. The LT3 pictured has been flawless with all D1 refills.