"18th Century Brass Graphometer With Built-in Compass"
This 18th-century brass graphometer is an angular measuring instrument used in topography and cartography to accurately measure horizontal angles. It is equipped with a central compass to orient measurements relative to magnetic north. Its ornate design and delicate engravings are a testament to the craftsmanship of the time, making this object a valuable testament to the history of science and measurement techniques. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato