Brass disc 82 mm diameter mounted on 6 mm rod.
In Stock
In metal frame and handle, chrome plated.
Clear glass, ground edges.
Metal holder with sides grooved to hold lens up to 50 mm diameter on wooden support.
Optically worked, back silvered, with protective coating.
Wooden, with V shaped slot to take spherical lens or mirror up to 75 mm diameter, with index mark.