Ocular goniometer
Beck, London
Ocular goniometer, chrome plated brass with engraved
scale and vernier read-out, ocular and cross wires (height
4.5 cm). In wooden case (width
10.2 cm, height 5.8 cm).
Signed "BECK LONDON" on the circle, first half 20th century.
Collection: private collection
|


|
|
|