A trial lens set from the early 1900s 4 sections “Cylindrical concave” “Cylindrical convex” “Spherical Concave” and  “Spherical Convex” with 12 lenses in each section and on the back leaf there are an additional 6 coloured lenses with clear, opaque, spot and slit apertures and coloured glass

The lenses are all present and correct and are contained within a leather wallet which holds them in two “pages” in a book configuration.

• From the Phisick collection