562 - Three-draw brass telescope with leather covering, draw telescope or marine telescope, 19th century

Three-draw brass telescope with leather covering, draw telescope or marine telescope, 19th century Brass, leather and glass, three-draw telescope, also called draw telescope, in classic design, brass body, grip area on the barrel of leather, portable spyglass or marine telescope, 19th century, optics predominantly clear, used condition commensurate with age, heavily rubbed, objective lens with small scratches, eyepiece with two chips. Please inspect. L. 41.5 cm (maximum) Terrestrial draw telescopes have a so-called erecting system of further lenses behind the objective, which shows the image upright and the right way round, but at the cost of light-gathering power. As early as circa 1730, terrestrial draw telescopes with seven nested tubes of cardboard, leather and glass were made in Italy.