1980 300SD Bent voltage regulator

I removed my voltage regulator and when I took it out it looked like the attached image. Basically one brush at an angle and touching the other brush. I just put the new one it but after screwing the new one in I'm a bit confused as to how the old one got the one bent brush. Any ideas? Was it just a cheap part? There was no brand on it at all.

I guess this might get removed but images make it so much easier to show what is going on.

Matt

http://i.imgur.com/gFX2Z.jpg

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