cal. 978 automatic nickel lever movement 33 jewels 22k pink gold rotor mono-metallic balance rotating within an one-minute three-armed tourbillon carriage • silvered dial applied dagger and Arabic numerals engine-turned subsidiary dial for second time zone aperture with three-spoke seconds hand to reveal tourbillon carriage outer date ring with central hand • stainless steel circular case sapphire crystal display back secured by 4 screws • case dial and movement signed • with a stainless steel Jaeger-LeCoultre double deployant clasp