Killer Loop logo appears in the center of the nose area and on the rubber inserts on each temple. Logo is also embossed on the exterior of both ear stems near the rubber ear pads. Inside of one stem is marked Bausch & Lomb W2423, inside of the other stem is marked'Made In Italy'. But be aware that these are pre-owned sunglasses so there's going to be a little wear and a few tiny scratches on the lenses from decades of normal use.
Look at all of the photos and judge condition for yourself.