Hello, here is a Rotring 600 from my personal collection.

I used to have a bunch of these and held on to this one as a collector's piece. It was sold to me as NOS and inked once; it still has a B sticker on the back. The 18k nib has a lot of tipping material for those of you considering getting a special grind for this pen.

Asking $380 shipped.

https://imgur.com/a/GkHSPbl