Look like they stuck the EMR portion of the Lamy Safari EMR pen into a standard Lamy Safari body.
I also have this pen and can confirm it is a great alternative (and much cheaper) than the official RM pens.
That being said, it does require installing a hack onto your RM to make the eraser functional.
How do you close a document with these hacks installed? I have been stuck for a literal hour.. why was the button removed??