Ocular goniometer

R. Fuess Berlin-Steglitz
Ocular goniometer (nickel plated brass), with engraved scale and vernier read-out, ocular and cross wires (height 9 cm). In red plush-lined leather-covered case (width 10.5 cm, height 7.5 cm).
Signed "R. Fuess Berlin-Steglitz" on the circle and an etiquette with the text "R. | FUESS | BERLIN-STEGLITZ" is glued on the cover of the case, end 19th century.

private collection