Some pictures of the Jaeger Lecoultre Geomatic.
You certainly know the Geomatic, one of the most famous Jaeger Lecoultre Chronometer, which took the place of the Geophysic, in 1962.
The Geomatic, to make it short, came with two different cases and two different metals.
Ref E 398:
With its famous medallion:
In Rose Gold ( it also existed in yellow gold ), Ref E 398:
And in both cases, the Cal 881:
Its modern interpretation, the Master Control:
As you can see, the lugs are not the same for the steel and the rose gold. They are longer for the steel, shorter and maybe more refined for the gold version.
I regret my steel Geomatic, as it was really wonderful, but I cannot complain, as the rose gold comes with its box, papers and... Wallet!