Optics

Double Convex/ Concave Lenses, Spherical
Made from optically worked glass, highly polished
Plano-Convex / Plano- Concave Lenses
Optically worked faces, ground edges, made from glass
Set of Six Lenses P-2920
Made from optically, worked glass, round edges and polished faces, dia 50 mm. one each double convex, plano-convex, concave-convex, convexo-concave, double concave, plano-concave, in wooden case.
Cylindrical Lenses P-2935
Clear glass, with ground ends and optically workedfaces.
Mirrors, Concave/Convex P-2985
Glass, optically worked, back silvered both concave & convex type. I : Convex (cx) II : Concave (cv)