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38mm solid upcurve bifocal lens & envelope
OPHTHALMIC LENSES
lens
Mid 20th c.
glass
overall: 40 x 40 mm; segment: 38 mm

Solid upcurve bifocal lens in plain white lens envelope with handwritten identification. 38mm segment. Red ink marking of centre line.


2004.397

Gift of A.S. Whitmore, 2003


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