A collection of instruments including a part ebony octant with framed vernier scale and clamp; an Ernst Leitz Wetzlar No.268667 monocular microscope, in mahogany case; a spirit level by E.Preston & Son ; and a surveying cross by Stanley
A collection of instruments including a part ebony octant with framed vernier scale and clamp; an Ernst Leitz Wetzlar No.268667 monocular microscope, in mahogany case; a spirit level by E.Preston & Son ; and a surveying cross by Stanley
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