
Piaget-Emperador-Coussin-Ultra-Thin-Minute-Repeater-Watch-movement
An inner ring is inserted for a Minute Repeater, as the gong strikes
this, it resounds. (Photo from Piaget.)
3- Minute Repeater. A watch that chimes the time by striking the
hours, quarter hours and minutes and is activated by a slide or
pushpiece. Hammers strike one or several gongs. The sister complexities
of this watch are sonnerie and other striking or musical watches.

Rattrapante movements are very complex.
4- Split-Second Chronograph or Rattrapante. A split seconds
chronograph, rattrapante, or double chrono offers the capacity to record
and display two separate events and allows the two time intervals to be
compared. Essentially, the watch has two seconds hands. With the first
push of a button, both hands start together; the push on the
split-second pusher stops one hand in place, while the other separates
from it and continues to time the other event and one can read the
intermediate time while the other chronograph continues to progress. A
second press will make the stopped hand catch up with the moving hand.

JLC Master_Ultra_Thin_pg From side view, ultra-thin watches can look as slim as a half dollar. (Photo from Jaeger-LeCoultre.)
5- Ultra-Thins. The ultra-slim or flat timepiece is a true work of
art. Making a large movement is easy, but when one has to build hundreds
of mechanical parts and get them to work inside spaces that are so thin
that, when cased, the profile of the watch is less than 6mm mere in
height, it is an amazing work of art and craftsmanship. Hence, it falls
into the watchmaking world’s complicated feat category, and the race is
on the mechanical watchmaking world to continue to break records for
ultra-thin watches.
Then there are a series of other complications that also can come
into play, such as chronographs (watches that measure time intervals
with a start and stop button and don’t interfere with time indication),
power reserve indicators (that provide the wearer with information as
the remaining energy in the mainspring), moonphase indicators (that show
the phases of the moon), world timers (that tell time in multiple
zones), and more.mehr sehen
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