What happened to him?

I just bought this used Darkus Percival and as it arrived i noticed that the magnet is exposed, it doesnt seem to be fake so I wondered why this was done or if it was always this way.

Around the hole is one part that seems like someone broke the plastic there but otherwise the opening looks so smooth that you would think it was produced this way (see Picture 1 and 3)

Does anybody know why its this way?