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Pair of crossed cylinders and case
OPTOMETRIC INSTRUMENTS
crossed cylinder; case
Europe: United Kingdom
20th c.
steel; glass
overall: 119 x 37 mm
2000.129
OPTOMETRIC INSTRUMENTS
crossed cylinder; case
Europe: United Kingdom
20th c.
steel; glass
overall: 119 x 37 mm
Pair of cross cylinders. Slightly different designs. Steel handles. Round lenses with red and white positive/negative markings. Contained in a black leatherette-covered wooden hinged case.
2000.129
Gift of Mrs E. M. Blackburn, 2000