Seller claimed to know nothing about this lens but it was really really cheap so I took a chance on it. I have liked results from other Pluracoat designated lenses I have had.
Lens turned out to have Pentax K mount, as I thought it would. There are no extra contacts for any auto functions, so strictly manual focus.
Aperture blades gummed up, and no easy way into this lens, the mount lacks any visible screws.
So I put the blades to about f/11, taped the aperture control ring, and bent a few parts to disconnect the stop down lever from the rest of the mechanics.
I put the lens onto a digital Pentax body set to Aperture Priority mode, ASA 800, and gave it a few test shots.
The "look" of the images is, I think, interesting, kind of a warm glow to the colors.
Front rim is bent up fairly badly so it will not accept any filters.
Although the focus was a little off, I like the posture of the bird flying off to the left of the bird feeder. That shot was from 25 to 30 feet away.
Set up stills were with lens turned to "macro" range, camera on tripod, objects on white foamboard, and scene lit by mixed overhead fluorescent tubes.

So, what do you think?

Please click on thumbnails to see enlarged.
All images are ©2018 E.J.Kowalski.
Thanks! Ed