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F.B.A.'s Optometer / Hand optometer
OPTOMETRIC INSTRUMENTS
optometer
19th c.
brass; ivory; glass
overall: 85 x 285 x 39 mm

Brass simple optometer. Handle, screw eyepiece with convex lens, test-object with ivory plate and graduated arm. Scales marked 6-48 and 3-14.


1999.315

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