A brass graphometer with solid plate, not perforated, and with a beautiful thickness of 4mm, signed “Canivet à la sphere à Paris” and dated “1764”. We do not know any other graphometer from this period with a thick non-perforated brass plate. The instrument measures 15.5 cm in width. It is complete with its balljoint and its foot, its four sight of which two are mounted on a mobile alidade, its original compass and needle. Old cleaning but extremely rare model of a Canivet graphometer. In addition, the instrument has kept its original shaped box (the two slots for the sights are however missing). This item is in the category “Antiques\Science & Medicine (Pre-1930)\Engineering”. The seller is “lezograscope” and is located in this country: FR. This item can be shipped worldwide.