Van Cleef & Arpels JLC 101 (VCA)

The Jaeger-LeCoultre Calibre 101 is a manually wound movement measuring 14mm × 4.8mm (or 29mm × 5mm in another configuration), placing it among the smallest mechanical calibers ever produced. Sourced from Jaeger-LeCoultre and finished to Van Cleef & Arpels specifications, it exclusively powers the maison's high jewelry timepieces. The movement remains in production.