German Mechanical Pencil with Swastika

[LunarCastle]

My grandparents have an old mechanical pencil that I saw years ago and I was wondering if anyone has any information on it. I've tried looking around the net but I can't find anything helpful.

The pencil looks very similar to these two:

Pencil 1

and

Pencil 2

The main difference is the end of the pencil has a swastika on it. I think it was a red swastika but it may have been white. I also believe it was manufactured by Carl Zeiss, that sounds very familiar.

Any information regarding this would be helpful!