This antique French spherometer is a unique piece of optical equipment used in optometry and ophthalmology. Dating back to pre-1930, it is a rare find for collectors and enthusiasts alike. The instrument is made of brass and features a circular base with three adjustable arms and a central spindle with a graduated scale.

The spherometer was designed to measure the curvature of lenses and other optical surfaces with great precision. It is a testament to the craftsmanship and ingenuity of early optical instrument makers. This piece is in excellent condition and would make a stunning addition to any collection or display.