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+====== Crown pusher ======
+A **crown pusher** combines the functions of a [[crown]] with those of a [[pusher]] in a single knob.
+Although many [[monopusher]] [[chronograph]]s have a pusher that is co-axial with the crown, a **crown pusher** is something else entirely. The crown (and [[stem]]) is the pusher. For example, in the [[Seiko]] [[Seiko 6139|6139]] movement, the crown is pressed [[Quickset date feature|to advance the date]]. Some other movements, including the [[Eterna-Matic]], use a pull of the crown for this function. Very few movements have used this technology, which makes it easy to accidentally trigger a change.
+{{tag>Terms}}