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small aperture trial case and frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case; trial frame
Early 20th c.
wood; metal; glass
case: 48 x 132 x 116 mm

Trial case comprising hinged wooden box with upper and lower sections, the lower section containing 80 small round aperture lenses (ten lenses missing), red and grene filters, frosted occluder and thick minus lens; the upper section accessed through a sliding catch panel and containing 48 small round aperture lenses (2 lenses missing) and an astigmatic trial frame in shiny white metal with pince-nez style cork plaquets, telescopic brow bar jointed to bowed straight sides, round eyes with double drop cell in front of each eye, engraved scale (0-90) and swivelling metal occluder.


2003.232

Ex Keeler Collection



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