19th century Berge telescope

19th century Berge brass single-draw library telescope with rack and pinion focusing, inscribed ''Berge London, late Ramsden'' on barrel, set on tripod base with elevation strut and wood-handled 360 rotary, fitted in a mahogany case with celestial and terrestrial lenses. Lacking objective lens cover, dents and scuffs. 2-1/2''dia. objective lens, closed 39-1/4''l. Provenance: Estate of William Kranker, collector and dealer, Greenport, NY.