The model is complete with lenses, a diagram showing path of rays and is fitted on stand, for demonstration.
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Sizes :
Brass dial head 40 mm diameter divided and marked in 100 divisions, vertical scale 10-0-10 mm, fitted on heavy brass disc, with 3 pointed legs, distance between legs 40 mm.
Free from air bubbles, all sides polished
Optically worked, back silvered, with protective coating.
Wooden block 50 x 50 x 50 mm with slot to take rectangular mirrors.
Diameter 25 mm, mounted in plastic eye-grip frame x 2.5 x 3 x 3.5 x 4
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