Contact goniometer with detachable arms

F. Pellin, Paris
Contact goniometer with detachable arms (nickel plated brass, steel, outside diameter 10.0 cm). The scale is finely divided (0.5 degree).
Signed "F. Pellin | Paris", [N°] "11", ca. 1910.
Félix Pellin worked with his father Philippe Pellin at the beginning 20th century.

private collection