I have a fairly high quality pen that i am unable to identify. I actually got it with a case that I bought not to long ago. I took it to a colleague of mine who is a seasoned Pen enthusiast and he and i are baffled by this one. It comes completely apart and all of the machining is absolutely perfect. Everything fits together perfectly with almost no friction. All parts of this pen (Except for the feed of course) are metal of one type or another and nothing is oxidizing. The nib has a nice looking vermeil (Ambiguous "Iridium point germany" stamp) that writes smooth as silk. The main problem is that the convertor receptacle is screw in and proprietary. I would love to use this pen other than just dipping it, but i need to figure out what it is so i can get the parts.....Any Ideas? The cap stone piece looks to be Onyx possibly, although i am no jeweler so i can't be sure.