Description

A very early brass sector, not signed, but Italian and from the late 16th century or early 17th century.

The instrument consisting of two flat legs folding each other like a scissors with steel decorative tips at their end. The legs are inscribed with one double scale on each side from 2 to 12 to divide a line down to the twelfth part and another one from 3 to 10, certainly a stereometric scale.

The hinge has a index in form of fish with an egnimatic graduation from 0 to 70.

The condition is excellent despite a small lack of steel at one point.

For two very similar example, see :

-One in Firenze at the Galileo Museum :https://catalogue.museogalileo.it/object/ProportionalCompasses_n01.html

-Another in the Koelliker collection in Milano and reproduced in Misurare ciel e terra, 2003, page 10.

Size closed : 17,3cm lenght and 3cm width.