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Mahogany and brass 'Smeaton's Block', an adjustabl
Mahogany and brass 'Smeaton's Block', an adjustable wedge for converting an altazimuth stand into an equatorial mounting
Mahogany stand for Gregorian reflecting telescope
Mahogany stand made by the Science Museum workshops for Gregorian reflecting telescope of 2 1/8-inch aperture with shagreen covered tube .