"Protractor At Bras De Richer, Circa 1810"
Large protractor with arms and rather original shape with a decorative circle in the center of the semicircle which reminds the cutting of graphometers for the location of a compass. The protractor is divided from 0 to 180 degrees and vice versa. The center is provided with a glass engraved with a cross to allow precise positioning. It is kept in its original wooden case. We can date the instrument around 1800-1810. The box measures 30x11.5 cm and protractor: 27.9 cm in length 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato