Bi-focal spectacle lens
1900
Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges
1904
Oval amber double concave spectacle lens
Oval pink meniscus convex spectacle lens
Oval white convex bi-focal spectacle lens, 1845.
1845
Oval white 'new system' deep plano-concave lens.
Oval smoke meniscus convex spectacle lens
Oval blue meniscus concave spectacle lens
Plano-concave cylinder 'chlorophylle' tint
Oval blue bent glass spectacle lens, medium tint.
Oval smoke or neutral tint
Oval white concave spectacle lens with a grooved edge
Square 'Kryptok' fused slab and segment
Three spectacle lenses.
1900-1930
Oval smoke or neutral tint bent glass spectacle lens
Oval white double convex spectacle lens
Round 'Kryptok' fused slab and segment
Round white 'Kryptok' tonc bi-focal spectacle lens
Tinted spectacle lenses
1851-1920
Oval smoke or neutral tint bent glass spectacle lens
Oval blue double concave spectacle lens
Lens, oval shaped
1890-1940
Optical Trial Case
1911
Round white 'Kryptok' tonc bi-focal spectacle lens
Round white 'lenticular' concave spectacle lens
Oval white double concave spectacle lens
Blue plano-cylinder concave spectacle lens
Lens, clear glass
1890-1940
Smoke or neutral tint glass for preserver spectacles
Bi-focal spectacle lens
1899
Round blue deep double concave spectacle lens with ground edges
Oval smoke double concave spectacle lens
White plano-concave spectacle lens
1905-1915
Two bifocal spectacle lenses
1870-1930
Lens, circular, blue-tinted glass
1880-1930
Oval white bent glass for protectors spectacles.
Oval blue bent glass spectacle lens, pale tint.
Oval 'Chlorophylle' bent glass spectacle lens
Oval blue bent glass spectacle lens, dark tint.
Round white deep meniscus concave spectacle lens
Oval smoke meniscus concave spectacle lens
Round blue double convex spectacle lens
Square 'Kryptok' fused slab and segment
Square 'Kryptok' fused slab and segment
'Strubin' cemented bi-focal spectacle lens
1891
Oval white meniscus concave pebble spectacle lens
White convex spectacle lens
Lens, roughly cut
1890-1940
Nine lenses from sunglasses, English, 1880-1940
1880-1940
