The BIG Euryscop's don't come along very often, and frankly, I'm probably making a mistake to offer this. It's in gorgeous shape with the only very minor flaw being a little waviness of the front bell after 135 years! Original flange is included. Glass is spotless. Includes a single waterhouse stop of f11. Focal length is 17 inches f6. If you've never had the pleasure of using one of these, they really are very special. Crisp beautiful contrast and a gorgeous flat field. You wonder why they bothered going to the anastigmats, these are so good. $625 plus shipping. I could probably do better at Ebay. They seem to be going banana's over there lately.