Selsdon, if nothing else, were inventive. They turned out fountain pens which varied from the passable to the very good. I’ve written before about their ballpoints.
This thing, which could also be called a ballpoint for want of a better word, is a lever filler with a ball point of sorts. The amount of wear on the pen, particularly on the clip, suggests that it once worked well enough to be in use for some time.
I can’t make it draw ink. There is a blockage inside the hood. It doesn’t remove for servicing but some time in the ultrasonic cleaner might yet clear it.
I don’t quite suggest that Selsdon are underappreciated because much of their output was unashamedly aimed at the lower end of the market. However, they were not afraid to take a risk with something new. It would be good to know more about them.