Your pen is really nice, congratulations! Iridescent vintage pens can really be beautiful -- I have a Waterman Stalwart that does amazing things as I roll the barrel in the light. My only Pelikan brown tortoises are a 1980s M400, and an M101N.
Are you sure that the nib is a Kugel? It looks to me like an oblique, including the little "○" stamped into it.
Thanks! I cannot stop admiring the pen. The tortoise shell is really gorgeous. The color is bright and deep at the same time.
It is a Kugel, I could see the little ball like bump on the tipping, but the ball is not on the bottom where the tipping touches the paper. It matches the description I read in a much older post here.
The o mark on a script nib does not necessarily mean oblique. I must have read it on pelikan perch or pelikan collectibles, cannot recall the link now.