Hi there, I'm restoring a Verbana fountain pen equipped with a button filling mechanism, a Warranted 14K U.S.A. nib with a heart shaped breather hole. I don't know the model type / number. I'm currently awaiting parts to replace the ink sack. In the meanwhile I've sanded the pen down and polished it on the polishing wheel using a fine compound. The ring on the pen seems to be 14K as well. The clip of the pen is missing, but I don't know what type of clip was used on this pen. It looks as though the cap has a vertical groove at the end inside the opening, but I'm unsure how this would accommodate a clip. Any suggestions? Kind regards, Mathieu