Now 190 https://www.bruhren.de/produkt-Sammlungen/navitimer/ years old, JLC has made and supplied calibers for just about every prestigious watch brand on the market. Within their extensive back https://www.brwatch.to/product-category/classic-avi/ catalog of over 1,300 movements exists Caliber 920, the only caliber to be used by all three brands in the holy trinity: Patek Philippe, Vacheron Constantin, and Audemars Piguet and for some pretty important watches https://www.brmontres.com/Collection/premier/ too: PP Nautilus ref. 3700/1A and AP Royal Oak ref. 5402ST and VC ref. 222.