Bought this in the late 1980's when I lived in the US. It's probably been used a dozen times on the range over the years, as I now have a Swarovski scope that I use instead.
It is a catadioptric mirror lens, which apparently can be converted to fit on a Pentax camera, though I've never had the adapter. It is 15x magnification.
The scope comes in the original box with the table-top tripod and lens hood. I also have a square zipped Cordura case which I'll include if someone buys the scope.
The lenses are unmarked, as I've always kept a filter on the lens. There's one small scuff on the bend of the eyepiece where the black paint has worn away, which you can see in the photos.
The two photos are of the dog cage mesh at the bottom of the garden (30 yards) and branches of a tree about 400 yards away - they were waving in the wind, hence why they haven't come out terribly sharp in the photo.
Last one I saw for sale was £150 at a camera shop, but I thought I'd offer this for £75 including RMSD on the Stalking Directory before putting it on eBay.
Just found one similar on eBay in the US: Pentax Spotting Scope 300 | eBay