I admit I do not use this pen the way it deserves to be and so I am moving it on to an appreciative FPN user IN THE UK ONLY. Sorry to raise my voice. Transatlantic postage is stupid expensive.
The pen is from a Group Buy. It is entirely of polished black ebonite. It should have a Schmidt K5 converter, but the red rubber seal washer inside the converter failed. It has a Jinhao converter in there now.
The pen has a 3 in 1 ink feed but i'd suggest you had a specific nib unit for that role as a Bock 250 nib unit writes very wet with 2.5ml of ink in the barrel. The pen has a Fine & Extra-Fine Bock 250 nib unit included.
I am passing the pen on because my preference is towards Eyedropper pens with basic ebonite feeds for easy cleaning.