The Night Owls used an Abbe-Koenig roof prism like the Dialyts and were internally focusing and waterproof. Their body is of a lightweight fiberglass reinforced carbon material. They're "black forest" (black and grey) styling. They're in excellent condition & the lenses are scratch free. They come with original box, carrying case, carrying strap, & rubber eyecup protectors. These were manufactured in 1994 per Zeiss. Email with any questions. These are for sale else where, so let me know if you're interested & I'll remove the other listing. Asking $900 & $15 shipping.