This Hartl light refraction optical disk designed by Professor Hans Hartl is a highly sought-after scientific lab instrument for collectors and enthusiasts alike. Made by the Central Scientific co. Chicago, IL. This is a rare piece is a valuable addition to any collection of optical collectibles.

With its intricate design and historical significance, this item is a fascinating piece of scientific history. Whether you're a collector or simply appreciate the beauty and importance of vintage scientific instruments, this Hartl light refraction optical disk is sure to impress.

Measures approximately 18” tall and 14” at the widest point.