Polished 90 mm dia & 20 mm thick approx.
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Six lenses with ground & polished faces & ground edges. Comprises one each of: double convex, plano convex, converging concave-convex, diverging concave-convex, double concave, & plano concave. Supplied in a velvet lined box.
Optically worked, ground edges
9cm x 14.5 cm , pack of 25 sheets.
To take lenses & mirrors of upto 75 mm diameter. Comprises a wooden upright 100 mm high, with a V shaped slot to hold convex or concave lenses or mirrors mounted on a rectangular wooden base.
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