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Priestley Smith Keratometer Trial Lens
TRIAL CASES, FRAMES AND REFRACTOR HEADS
diagnostic trial lens
Ellis Optical Company
Europe: United Kingdom, England
Mid 20th c.
metal; glass
overall: 38 mm x 52 mm
2009.200
TRIAL CASES, FRAMES AND REFRACTOR HEADS
diagnostic trial lens
Ellis Optical Company
Europe: United Kingdom, England
Mid 20th c.
metal; glass
overall: 38 mm x 52 mm
Diagnostic trial lens comprising round glass lens with straight graduated scale across the centre and white metal outer trial lens rim with handle.
2009.200
College Purchase, 2009