The TWSBI Classic comes with a benchmark piston ink-filling mechanism and has all detachable parts. Similar length but slimmer than its sister pen, the Diamond 580.
Glossy finish with an ink window and a medium stainless steel nib.
New Update: Post-able end cap.
Comes in Black, Sapphire, Burgundy
Nib size: EF, F, M, B, and Stub1.1