Dividers, Drawing Instruments, Surveying Instruments and others.
Sold objects are listed here
Set of 3 Dividers in German Silver and Alu, 19th and 20th Century. 8.5 cm, 13.0 cm, 14.6 cm
French Level & Sector in Brass, Vayringe a Florence, 17.4 cm x 2.4 cm, Philippe Vayringe (* 1684 in Nouillonpont; † 1745 in Toskana) a french instrument maker.
Big brass German Protractor by S. Winckler à Berlin, late 18th century, 21.0 cm x 15.8 cm, High of footer 7.0 cm.
Collection of links regarding scientific instruments in the Web: https://www.pinterest.com/geometricum/scientific-instruments-in-the-web/