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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}}