American Optical Corporation
Buffalo, N.Y, U.S.
||Product number printed on the associated paper
||Printed in black on the back of the paper bag.
overall: 1 3/4 in x 7 1/4 in x 1 in
This record contains a set of red and green Worth, 4 dot slide spectacles, with round reversable frames. The red and green lenses are an aide in testing for binocular vision.