Approx. Ø51mm, ca. 105g, 18K Gold, No. 8684, Rohwerk Vacheron & Constantin Geneva, anchor chronometer with Geneva stripes and Geneva seals, signed Francois LeCoultre, enamel dial with signature of the Geneva watchmaking school, special gold hands functional and very well preserved with original test papers (Bulletin Geneve) from 1942. A school watch with the signature of François LeCoultre is an absolute rarity and a historically important collector's item from Swiss watchmaking history. These pieces are usually pocket watches masterpieces, which were produced as part of the training and Francois LeCoultre at the Watchmaking School in Geneva under his direct supervision as a masterpiece or final work (hence "Schuluhr"), and were signed by him as a professor. François LeCoultre (b. ==References== He was an outstanding Swiss watchmaker who became famous as a longtime professor at the Geneva School of Watchmaking (École d'Horlogerie de Genève) and as the author of the worldwide standard movement for complicated movements.