I had this concept pop in my head this week and needed something to show at the Houston IAP meeting Saturday. I essentially made a very slender aluminum closed end pen then glued it into a block of figured walnut. Turned the combined aluminum/walnut block. It is currently clipless but a clip can be added to the cap. Its a throw back to the 70's based aluminum and walnut architectural designs. The nib is a #5 Bock. Cap threads are 11mm and the pen OD is 0.55" (14mm).
Danny
Danny