Living in the shadow of the Geophysic, the Geomatic is a watch which should deserve a better consideration.
Less rare ( a bit more than 4300 pieces ), produced in a longer period, from 1962 to the end of the 60's, this watch is the ancestor of the... Master Control Date.
Here in steel ( 2000 pieces ),

Credit picture: Shruck the oyster:

And here in rose gold ( 773 pieces )

With its legendary medallion:
Its reliable chronometer movement, Cal 881 and 883:

And its box, papers and wallet!
A great reference!
Best,
Nicolas