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'Stigmalentic' lenticular bifocal lens
OPHTHALMIC LENSES
lenticular lens; bifocal lens
20th c.
glass
overall: 42 mm
1999.5638
OPHTHALMIC LENSES
lenticular lens; bifocal lens
20th c.
glass
overall: 42 mm
'Stigmalentic' lenticular bifocal lens. PRO-shape. Glass. Upcurve bifocal segment. 3 ink dot markings.
1999.5638