Jaeger-LeCoultre caliber 923
|Hands:||Hours, Minutes, Seconds, Additional 12 Hour Hand (adjustable), Day / Night Indication, World Time|
Self-winding movement with second time zone AM/PM indicator and city ring, operated through twin crowns. It consists of a total of 281 components, including 31 jewels.
'World Time' as listed among its functions can be disputed, as only one additional time zone can be properly read.