That's actually a bit of an unusual variant, likely correct, but one I can't offhand pin to a well known cluster of models. I might've seen one or two like it before, not more. That style clip usually pops up on lower line WASPs. Clippers usually do not show up with flat top. There is debate about whether the usual "circuit board" style WASP, when done in black, even was done as oversized. And this isn't quite black "circuitboard" pen anyway. The transparency is consistent with late 1930s barrel clarity pattern in Sheaffers, proper.
Here's some lower line WASPs that have that sort of clip.
Of note, if you want to part with this pen, I'd be interested