The nib is a rare KF. Please enjoy the unique writing feel of the Kugel nib. The filling mechanism has been tested and confirmed to work. There is an engraving on the cap ring, and it is a later model with a thicker feed. It is being offered at a bargain price due to ink stains on the ink window and a crack on the edge of the section (which does not affect practical use). The cap has slight hairline scratches, but they are almost unnoticeable, so it is in very good condition.