Bi-focal spectacle lens
1900
Round 'Kryptok' fused slab and segment
Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges
1904
Oval pink meniscus convex spectacle lens
Oval white convex bi-focal spectacle lens, 1845.
1845
Oval amber double concave spectacle lens
Oval smoke meniscus convex spectacle lens
Oval blue meniscus concave spectacle lens
Oval white 'new system' deep plano-concave lens.
Plano-concave cylinder 'chlorophylle' tint
'Strubin' cemented bi-focal spectacle lens
1891
Oval smoke or neutral tint bent glass spectacle lens
Oval blue bent glass spectacle lens, medium tint.
Three spectacle lenses.
1900-1930
Oval smoke or neutral tint
Oval white concave spectacle lens with a grooved edge
Square 'Kryptok' fused slab and segment
Oval blue bent glass spectacle lens, pale tint.
Oval blue bent glass spectacle lens, dark tint.
Oval white double convex spectacle lens
Round white 'Kryptok' tonc bi-focal spectacle lens
Oval smoke or neutral tint bent glass spectacle lens
Oval smoke double concave spectacle lens
Oval blue double concave spectacle lens
Tinted spectacle lenses
1851-1920
Lens, clear glass
1890-1940
Oval 'Chlorophylle' parallel glass
Round white 'Kryptok' tonc bi-focal spectacle lens
Oval smoke or neutral tint bent glass spectacle lens
Round white 'lenticular' concave spectacle lens
Round white deep meniscus concave spectacle lens
Oval white double concave spectacle lens
Blue plano-cylinder concave spectacle lens
Two bifocal spectacle lenses
1870-1930
Lens, oval shaped
1890-1940
Optical Trial Case
1911
Oval smoke meniscus concave spectacle lens
White plano-concave spectacle lens
1905-1915
Smoke or neutral tint glass for preserver spectacles
Oval white deep double concave spectacle lens
Bi-focal spectacle lens
1899
Round blue deep double concave spectacle lens with ground edges
Oval white meniscus convex spectacle lens
Two bifocal spectacles lenses
1901-1930
Oval white bent glass for protectors spectacles.
Oval 'Chlorophylle' bent glass spectacle lens
Round blue double convex spectacle lens
Square 'Kryptok' fused slab and segment
Square 'Kryptok' fused slab and segment
