Design: Plossl (says so right on it)
FL: 8mm (also says so right on it)
Coatings: Unknown but appears to be greenish multicoat
Performance: Quite good actually - bit short on eye relief
Outstanding characteristics: It's cheap! Well, it's also actually very well made. You just might be surprised!
Price: $20 postage paid in US.
THIS JUST IN! The unknown eyepiece has been identified as a B&L eyepiece. That should make it worth twice as much but, since I'm a person of integrity, I'll maintain my bargain basement price.