I just came across two lenses and am wondering if someone can help identify their use, or model designation. Unlike other Wollensak lenses I have or have seen (Raptar, Velostigmat, Verito, etc.) these two Wollensak lenses are labeled "KENRO". One is a 16" f10 lens, the other a 10" f5.6 lens. Both appear fairly recent in the long Wollensak history of lenses, are jet-black, with bright red engraved markings. Both come with huge, thick, matching lens caps (both ends). Are these special copy lenses? The only markings are on the frontispiece, around the outer glass element. The larger lens, in additon to the focal length & word "Wollensak", reads "Kenro KV", while the smaller lens reads, simply, "Kenro" - in addition to the marker "Wollensak". There is a symbol on the lens after the word Kenro, but it is not the Wollensak symbol I have seen elsewhere. Any feedback appreciated.