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greubel_forsey_double_balancier

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greubel_forsey_double_balancier [02.12.2022 20:43] (current) – created - external edit 127.0.0.1
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 +====== Greubel Forsey Double Balancier ======
 +{{wst>image_cr|Greubel Forsey|Double Balancier|300px}}
 +
 +**Double Balancier** is a luxury wristwatch by [[Greubel Forsey]].
 +
 +The special feature of this watch is the double balance (//double balancier//): two oscillating systems coupled via a [[differential]], which contribute to an additional improvement of the [[rate]] precision. This invention was patented by Greubel Forsey.
 +
 +<WRAP ud ud_mod>
 +**Movement:**
 +  * [[Manual winding]] [[manufacture movement]], 21.600 A/h
 +  * Two Greubel Forsey [[balance]], inclined by 30°
 +  * Balance springs: [[Phillips terminal curve]], Geneva-style stud
 +  * [[Double barrel]]
 +  * Main plate: Nickel silver, frosted and spotted, with polished bevelling and countersinks, straight-grained flanks, grey treatment
 +  * Bridges: Nickel silver, spotted, with polished bevelling and countersinks, straight-grained flanks, grey treatment
 +  * Flat black polished steel differential bridges
 +  * Flat black polished gold centre bridge, with polished bevelling and countersinks, straight-grained flanks
 +  * 2 engraved gold plates (1x Greubel Forsey, 1x individual number)
 +  * Escapement platforms inclined at a 30° angle, Nickel silver, straight graining, hand-polished bevelling and countersinks, nickel-palladium treatment
 +  * 50 [[jewels]]
 +  * Olived-domed [[jewels]] in gold [[chaton]]s
 +  * 285 components
 +  * [[Power reserve]] 72 h
 +
 +**Case:**
 +  * 18ct [[red gold]]
 +  * Ø 43.0 mm, H 13.38 mm
 +  * Convex [[sapphire crystal]], caseback with [[sapphire crystal]]  
 +  * [[Waterproof]] to 3 atm
 +
 +**Dial:**
 +  * Multi-level black anthracite gold dial
 +  * Engraved and “oven fired” [[enamelled]] indexes (émail [[grand feu]] champlevé)
 +  * Differential rotation and small seconds indicators in gold
 +  * Hours and minutes hands in polished gold, with Super-LumiNova
 +  * Small seconds and 4-minutes hands in polished blued steel
 +  * Power-reserve hand in polished gold
 +
 +**Functions:**
 +  * Hours, minutes, [[small seconds]]
 +  * Indication of the differential
 +  * [[Power reserve indicator]] at 2 00
 +
 +**Bracelet:**
 +  * Hand-sewn alligator leather strap with [[folding clasp]]
 +
 +**Limited edition:**
 +  * 51 pieces (2016-2021)
 +</WRAP>
 +
 +{{tag>Watch_models Greubel_Forsey_models}}
  
greubel_forsey_double_balancier.txt · Last modified: 02.12.2022 20:43 by 127.0.0.1

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