Description

An early example of a mathematical set by Butterfield in its black leather case in the style square illustrated in the Nicolas Bion’s book first published in 1709. The case/étui of later examples of roundes shape, not like the present one.

The mathematical brass set preserves :

-A brass sector signed “Buterfield”

-A brass protractor signed “Buterfield”

-A brass folding square signed “Buterfield”

The three signatures are homogeneous et of nice quality with decorations.

-A large pair of dividers with sharp points ;

-A small pair of dividers with one moveable point for pen

-A pen with wooden handle ;

-Two brass and steel ruling pens of different size ;

-And a double-head ruling pen with a wheel.

Everything can be stored in the leeather case. Two instruments rare lacking but there is no replacement.

An early French mathematical set.

The case measures 18,5×7,5x3cm