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p.d. gauge
OPTOMETRIC INSTRUMENTS
pupillometer
E. Kirstein's Sons Co
North America: USA
Early 20th c.
metal
overall: 26 x 152 x 6 mm

Pupillary distance gauge (adjustable for p.d. 23mm-46mm or equivalent in inches). Two metal sliders on rectangular section bar. Shaped nasal support rest.


2003.143

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