possible date made: Pat. 1901
where made: Chicago, IL
model name: Ophthalmometer
Material
Brass
Color
Black
General Notes
Note
Pat. July 16, 1901- Aug. 27, 1901 & May 24, 1904, missing chin rest, comes w/cord, measures curvature of interior cornea for astigmatism testing.
One of the first self illuminating versions