Parker 45 Demonstrator

[LarryinIowa]

I was gifted a small collection. In it is a Parker 45 demonstrator.

I don't think they were common. And I'm not certain its genuine, though it does have Parker Made in USA on the cap.
It's curious that the section has four slight depressions similar to a Lamy Safari, though far less pronounced.

What shall do with the pen? I really don't want it. I'd just rather have a solid daily use pen.

Advice would be appreciated.