Black enamel plastic frame 100 x 75 mm with a graph paper.
In Stock
Glass, one each double convex, Plano – convex, concavo – convex, convexo- concave, Plano – concave and double concave lens, in box.
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.
Optically worked, back silvered, with protective coating.