Paul L kindly informed me about this Selfit nib which appeared as a replacement in a much better pen. I’d never heard of Selfit but as ever Stephen Hull came through with the information in his The English Fountain Pen Industry 1875 – 1975. Turns out the nib started life in a Wyvern Selfit pen of 1935.
This peculiar nib is plated steel. What makes it such an oddity is the presence of two tabs and a cylindrical base. These surround the feed and hold it in place. The feed (I assume it is original) is a very primitive thing for 1935, by which time feeds had come a long way.
Wyvern had been around for a long time by 1935 and was highly experienced in pen making. Why did they turn out such a crude nib for the Selfit pen? Did the pen require these unusual devices to hold nib and feed together because of poor tolerances? Was it just an experiment towards a new style of nib? How effective was it in delivering ink in its original pen? I have plenty of questions but no answers.
Though I can’t remember which pen it was I have seen a nib with tabs before, but never the cylindrical part. Considering that almost every other manufacturer managed perfectly well keeping everything together by the pressure of the nib and feed wedged into the section, where was the necessity for such a design? A patent might give us some answers.