Plane, circular, ground edges. Back silvered with protective coating
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Optically worked, in velvet lined case
Made from moulded glass, polished surfaces (a) 75 x 50 x 18 mm (b) 100 x 60 x 25 mm.
Whte finish metal box, mounted on a steel rod with 12V 100W halogen lamp
Kit includes 5 liters round bottom flask with cork, support ring, fluorescein and 3 lens to demonstrate long, short and normal sight.
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