Good day, all! I had a question about my nib. I have a Duofold International that I bought new about 1992 or so. It is blue marble and has a nib with the arrow pointing toward the tip. When I unscrew the nib to replace the cartridge, it does not look like pictures of nibs like mine I see online. In pictures, the nib has a gold band at the rear, and a gold colored metal collar with metal threads on it. My nib section is black, no gold collar, and the threads are plastic. I am noticing a gold band on the end of the barrel (where the nib screws into) and what looks like metal inside the barrel connected to the gold band. On my nib, the plastic tip that fits into the cartridge is totally exposed. I am wondering if the metal part of the nib unscrewed from the black plastic part of the nib and is now stuck inside my barrel? If so, any simple ways to remove it? Hard to get a grip on the gold ring as it is relatively thin. Thoughts?