A pair of proportional dividers with fine adjustment made by Royer à Paris. The instrument is signed by the maker. The box is closed with beautiful brass hooks.

Catalogue: NM.6-42
Date: ca. 1880
HWL: 2.5×22.5×3.3 cm
Signed: Royer Ft de Compas, Rue de l’Ancienne Comedie 12, Paris
Origin:
Condition: in good and working condition