cazalea[Seiko Moderator]
17091
I wasn't speaking of the "movement" when I first made my comment, I said "the complication"
Sep 22, 2020,09:41 AM
whatever motivates the dates and moon is almost irrelevant, as long as it has enough oomph!
In this case we don't know what's beneath but as Nico says, yes, it's a Kurt Klaus perpetual complication (I am not saying a separate module) that has been integrated into multiple watches of all sizes (small med and large) from multiple brands.
Here is some clarification:
Dubois-Depraz is not a watch movement maker. A watch movement is the basic mechanism for storing and releasing power in order to indicate the time. It is comprised of a mainspring barrel, an escapement assembly, and some gears that move hands.
What Dubois-Depraz makes are modules that can sit on base movements (such as the ETA 2892 which is a very popular choice for a base movement) and adds additional functionality: Calendar, chronograph, etc.
Perhaps JLC, as a long-time customer of DuBois-Depraz, had them adapt the perpetual calendar for use on a JLC base -- but if so, how does it get to be so thin?
Cazalea