I found this pen in my desk drawer while I was looking for my (long neglected) MB 163R. I do not remember buying it specifically. It is a really nice pen, nice heft to it, hard plastic body, posts well. The color did not come through well in the pictures. It is a lighter shade of green with a marbled appearance. I currently have a Montverde roller-ball refill in it. I know I have had it at least 10 years.
There are no markings on it anywhere I can see. Maybe it is just a literally no-name pen?