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Supplementary Lenses for the Stearman Refracting Unit
OPTOMETRIC INSTRUMENTS
refracting unit (part)
Europe: United Kingdom
Mid 20th c.
metal; glass; wood; leather; metal; silk
case: 35 mm x 122 mm x 100 mm; each lens unit: 13 mm x 28 mm

Set of four supplementary lenses (pairs of 2.50 and 5.00) and two coloured filters (red and green) for a refracting unit. Each lens/filter mounted in a metal rim and tube, with projections to hold firnly in place. Stored within a dark red leather-covered wooden case with hinged lid, apricot-coloured silk lining to lid, and brass clasp.


2021.651

Gift of Pritti Vasantrai Patel MCOptom, 2020



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