Lens, oval-shaped, pink-tinted

1890-1950

Lens, circular, blue-tinted glass

1880-1930

Lens, oval shaped

1890-1940

Pair of variform spectacle lenses

1990-1995

'Strubin' cemented bi-focal spectacle lens

1891

Oval smoke meniscus concave spectacle lens

Round blue double convex spectacle lens

Oval 'Chlorophylle' bent glass spectacle lens

Round white 'Kryptok' tonc bi-focal spectacle lens

Oval smoke or neutral tint bent glass spectacle lens

Oval white double convex spectacle lens

Oval smoke double convex spectacle lens

Oval smoke or neutral tint

Oval white bent glass for protectors spectacles.

Oval white meniscus concave spectacle lens

Blue plano-cylinder concave spectacle lens

Square 'Kryptok' fused slab and segment

Plano-concave cylinder 'chlorophylle' tint

Oval blue bent glass spectacle lens, pale tint.

Smoke spherical-cylinder concave spectacle lens

White convex spectacle lens

Oval smoke or neutral tint bent glass spectacle lens

Oval amber double concave spectacle lens

Oval 'Chlorophylle' parallel glass

Round white deep meniscus concave spectacle lens

Oval white double convex pebble spectacle lens with a grooved edge

Oval blue bent glass spectacle lens, dark tint.

Oval blue bent glass spectacle lens

Blue spherical- cylinder concave spectacle lens

D-shaped green tint glass for preservers spectacles

Oval blue bent glass spectacle lens, medium tint.

Round white 'Kryptok' tonc bi-focal spectacle lens

Square 'Kryptok' fused slab and segment

Square 'Kryptok' fused slab and segment

Oval white double concave spectacle lens

Oval pink meniscus convex spectacle lens

Oval white meniscus concave pebble spectacle lens

Round 'Kryptok' fused slab and segment

Round white 'lenticular' concave spectacle lens

Bi-focal spectacle lens

1900

Square 'Kryptok' fused slab and segment

Oval 'Chlorophylle' bent glass spectacle lens

Two bifocal spectacle lenses

1870-1930

2 spectacle lenses

1801-1920

Optical Trial Case

1911

Lens, oval, flat

1890-1940

Lens, clear glass

1890-1940

Lens, roughly cut

1890-1940

Lens, roughly cut oval shape

1840-1940

Lens, roughly cut glass

1900-1950