Oval blue meniscus convex spectacle lens (for corr

Optics

Oval neutral or smoke parallel glass for preserver

Optics

Oval smoke or neutral tint bent glass spectacle le

Optics

Smoke spherical-cylinder concave spectacle lens (f

Optics

Oval smoke or neutral tint, bent glass spectacle l

Optics

Bi-focal spectacle lens

Optics

1899

Oval smoke double concave spectacle lens (for corr

Optics

Oval white 'Strubin' cemented bi-focal spectacle l

Optics

1891

Square 'Kryptok' fused slab and segment, amethyst

Optics

Oval white concave spectacle lens with bevelled ed

Optics

Oval white concave spectacle lens with a grooved e

Optics

Oval white meniscus concave spectacle lens (for co

Optics

Square 'Kryptok' fused slab and segment, dark 'Chl

Optics

Oval 'Chlorophylle' bent glass spectacle lens, pal

Optics

Oval white bent glass for protectors spectacles.

Optics

Round white deep meniscus concave spectacle lens (

Optics

Oval smoke deep double concave spectacle lens (for

Optics

Oval white concave bi-focal spectacle lens with a

Optics

1876

Collection of spectacle lenses, part of the Horace

Optics

Oval white 'new system' deep plano-concave lens.

Optics

Oval 'Chlorophylle' bent glass spectacle lens, dar

Optics

Blue plano-cylinder concave spectacle lens (for th

Optics

Oval smoke or neutral tint, bent glass spectacle l

Optics

White oval Bright's patent bi-focal spectacle lens

Optics

1912

Square 'Kryptok' fused slab and segment, amethyst

Optics

Oval white double concave spectacle lens (for corr

Optics

Oval white convex spectacle lens with bevelled edg

Optics

Oval white double convex pebble spectacle lens wit

Optics

Round white 'Kryptok' tonc bi-focal spectacle lens

Optics

Oval 'Chlorophylle' parallel glass for protectors

Optics

Spherical-cylinder white concave spectacle lens (f

Optics

Blue spherical- cylinder concave spectacle lens (f

Optics

Oval smoke or neutral tint bent glass spectacle le

Optics

Oval white deep double concave spectacle lens (for

Optics

Smoke plano-cylinder concave spectacle lens (for t

Optics

Collection of eight spectacle lenses in original p

Ophthalmology

1955-1975

Oval amber double concave spectacle lens (for corr

Optics

Oval white meniscus convex pebble spectacle lens

Optics

Round white 'Kryptok' tonc bi-focal spectacle lens

Optics

D-shaped green tint glass for preservers spectacle

Optics

Smoke spherical-cylinder convex spectacle lens (fo

Optics

Oval white meniscus convex spectacle lens (for cor

Optics

D-shaped smoke or neutral tint glass for preserver

Optics

Oval smoke or neutral tint bent glass spectacle le

Optics

Oval pink meniscus convex spectacle lens (for corr

Optics

Oval blue bent glass spectacle lens, pale tint.

Optics

Square 'Kryptok' fused slab and segment, light 'Ch

Optics

Oval white meniscus concave pebble spectacle lens

Optics

Oval smoke or neutral tint bent glass spectacle le

Optics

Oval white double concave pebble spectacle lens (

Optics