An all brass, two-extension telescope of the type carried aboard the U.S.S. Constitution by Comodores Bainbridge and Hull, and by U.S. Merchant Marine vessels to spot the first sight of land; friendly, or enemy ships. This 20x, 40mm telescope is powerful, and has a narrow field 90ft at 1000 yards. Minimum focal length 32.8 feet. Maximum length extended 12.8 inches. Leather-grained covering on the main tube and modern coated optics. Comes with leather-grained carrying case.