Breguet

ei8htohms
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it's basically the same movement as in the Type XX

Hi Ivan,

The design is quite unique, and the only other movements I can think of using the same solutions are just different versions of the same movement.  The Omega 1040 and Ebel 137 are earlier versions and both of those movements as well as the Type XX movements all use the same basic design in particular with regards to the minutes counter.  Although in the Omega 1040 and the Breguet Cal. 584 (Type XXI) the minutes counter is in the middle, the Ebel 137 and Breguet 582 use the same design with some transfer wheels to move the minutes counter from the center (where it is natively) to the 3 o'clock position.  In that regard, I don't think the Type XX movement is any more solid than the Type XXI.

The movement can be quite robust, but it requires a lot of care in its set up and adjustment because of the nature of the flyback machanism and how elaborately it must interact with what amounts to three completely separate start-stop-reset mechanisms (one for each of the seconds, minutes and hours counters).  It's a design that really only makes sense as an evolution of previous designs, but that's just part of it's charm in my humble opinion.

_john