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trial case (bifocal segments)
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
American Optical Company
North America: USA, Massachusetts, Southbridge
1910-02-15
leatherette; metal; glass
1999.3073
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
American Optical Company
North America: USA, Massachusetts, Southbridge
1910-02-15
leatherette; metal; glass
Small leatherette trial case. Hinged lid. Sliding catch. Purple silk and velvet lining. Manufacturer's plate inside lid. Contains 12 pairs of bifocal segment lenses within full-size round trial lens frames of white metal with handles.
1999.3073