Offered is a Large Monocular, 13 in. long. Lens end is 2 & 7/16 in. in diameter. It was found in a box of misc. at an auction...best I can make out, looks like DPT Rochester USA lightly printed in the metal by the site. Looks like it is mostly Brass with old black paint on it. Please look at the pictures and email any questions. Thank you for looking.