Black Titanium with another great piece of William's Box Elder Burl.
Finished with 6 coats of MINWAX Polyurethane.
The Aero Twist Cap Parker tube is 1/4" shorter and the over all length of the completed pen is 5/8" shorter than the Sierra series. The clip length is the same as the Sierra series and the Aero nib assembly is slightly shorter.
For me, the jury is still out on this one.