Jaeger-LeCoultre caliber 936
|Hands:||Hours, Minutes, Seconds, Additional 12 Hour Hand (adjustable), Day / Night Indication, World Time|
|Additionals:||Power Reserve Indicator|
Self-winding movement with second time zone and world time indication - the latter through the city disc paired with the day/night indicator. It was used in the Master World Geographic, and later revived for the Polaris Geographic WT.