The old one is obviously no longer shaped liket it should be.
I just bought me a new one, and the differences are clearly visable.
The curves above the air vent inlets are complete gone in the old one, whereas they are quite prominent in the new one.
I suspect that someone reworked the old one without knowing what it should look like…
I am not going to reshape the old one, maybe sell it someday.
I just bought me the new one which was very expensive, by the way.
And I will get it cleaned to the steel, before rapainting it.