This set of Pseudo-Isochromatic plates is a valuable collectible for those interested in optical history. Made in the United States by American Optical in 1940, these plates were used for testing color perception. The set is in good vintage condition and has not been modified from its original state.

The plates are a fascinating piece of science and medicine history, and their unique design is sure to impress. Whether you are a collector or simply interested in the history of color perception testing, this set is a must-have for any enthusiast.

This item is in excellent condition and is ready to ship out within 24 hours.

Feel free to message me with any questions.

Thanks for looking