A lacquered brass Martins type drum microscope with rack and pinion focusing and draw tube focusing, sprung stage, concave mirror on circular foot, with accessories including lenses, in fitted velvet lined case - 11in.wide

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A lacquered brass Martins type drum microscope with rack and pinion focusing and draw tube focusing, sprung stage, concave mirror on circular foot, with accessories including lenses, in fitted velvet lined case - 11in.wide

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