You’re welcome, Leonov. 
I don’t have the H-1005 / H-1003 handy (packed away in storage) so I’m not totally sure about the notch for anchoring the clip. I know the H-2003 ~ H-3005 don’t have it. It may have been introduced for some reason on the last batch of the H-1005. Everything else looks right, so I don’t think it’s a knock-off.
You might find THIS interesting.