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18K GOLD JULES JURGENSEN WATCH CENTER SWEEP JUMP 1/5-SECOND 2-TRAIN TANDEM WIND

Estimated price for orientation: 9 900 $

Category: Antique
Class:











Description
Movement: Mechanical: Hand-winding Escapement Type: Lever
Year of Manufacture: 1870-1879 Serial Number: 11,516
Brand: Jules Jurgensen Model: Center Sweep Jump
Material: Solid Gold Pocket Watch Size: 17
Closure: Full Hunter Country/Region of Manufacture: Denmark
Features: 2 Train Jump 1/5 Second, 12-Hour Dial


Rare Jules Jurgensen Center Sweep Jump 1/5-Second 2 Train Tandem Wind 18K Pocket Watch with Stop & Start Button
Copenhagen/Denmark; Jules Jurgensen; Man’s; Serial # 11,516; CA1870
Complications: Center sweep (hack) jump 1/5-second.
CASE: The 18K Gold 17-size No. 11,516/15,466 hunter case has machined decorations and is signed “Jules Jurgensen.”
DIAL: This white porcelain single sunk dial features Roman numerals, Breguet hands and is signed “J. Jurgensen.”
MOVT: The bow No. 11,516 nickel movement has a lever escapement, bridge-style layout and is signed.
C 2
(The case is in perfect condition)
D 2
(The dial is in perfect condition)
M 3-6
(The movement is in very good condition, patinated)
R 9
(Rarity on a scale of #1 being very common to #10 being extremely rare)
Experts Opinion: Very heavy 18K Jurgensen jump 1/5-second with center sweep, controlled by a button at 12:00. A rare variation of the great watchmaker Jules Jurgensen!  
  AI-178-38ea
Train
A series of gears that form the works of a watch. The train is used for other functions such as chiming. The time train carries the power to the escapement.
Hacking feature—found on military watches, a mechanism that stops the second hand while the watch is being set. This enables watches to be synchronized to the precise second. This is now a very common feature on many watches. Bridge Style Layout
The metal bar which bears the pivot of wheel and is supported at both ends.  The bridge style watch has two or three fingers to hold the wheels in place and together are called a bridge.  The term bridge (horologically) is one that is anchored at both ends.
Lever Escapement
An escapement is a device in mechanical watches and clocks that transfers energy to the timekeeping element (the "impulse action") and allows the number of its oscillations to be counted (the "locking action"). The impulse action transfers energy to the clock's timekeeping element (usually a pendulum or balance wheel) to replace the energy lost to friction during its cycle and keep the timekeeper oscillating. The escapement is driven by force from a coiled spring or a suspended weight, transmitted through the timepiece's gear train. Each swing of the pendulum or balance wheel releases a tooth of the escapement's escape wheel gear, allowing the clock's gear train to advance or "escape" by a fixed amount. This regular periodic advancement moves the clock's hands forward at a steady rate. At the same time the tooth gives the timekeeping element a push, before another tooth catches on the escapement's pallet, returning the escapement to its "locked" state. The sudden stopping of the escapement's tooth is what generates the characteristic "ticking" sound heard in operating mechanical clocks and watches.
Hunter Cases
A hunting case covers the face of the watch consealing the dial.  The case is opened by pressing the stem or the crown of the watch.  Hold the watch in your right hand with the bow between the index finger and thumb.  Press on the pendant-crown with the right thumb to release the cover exposing the face.  When closing, do not SNAP the cover.  Press the crown to move the catch in, close the cover, then release the crown.  This will prevent wear on the rim and catch.


CUSTOMER SERVICE:
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