I had 1 many years ago on an Airsporter, a 6x40 Wide angle, lovely scope with cristal optics the wide angle aspect really helped with target aquisition!
BSA SuperSport
It would probably cost more than the scopes worth now, I'll still keep it though, good memories with it, I went from a cheap plastic 4x20 to a cheap 4x28, then the Kassnar 4x32, I thought is was the best thing since sliced bread then, my first decent scope that I could actually see through without a blurry image, and I didn't have to squint with (those were the days)