====== Greubel Forsey Invention Piece 1 ======
{{wst>image_cr|Greubel Forsey|Invention Pièce 1|Greubel Forsey Invention Pièce 1|270px}}

**Invention Pièce 1** is a wristwatch by [[Greubel Forsey]].

The //Invention Piece 1// is a tribute to the [[Greubel Forsey Double Tourbillon 30°|Double Tourbillon 30°]], the first fundamental "Invention" by Robert Greubel & Stephen Forsey, at which they had worked for four years. Volumes and surfaces are rearranged, the famous double [[tourbillon]] is located at the heart of a completely new indication two triangular hand elements - red for the hours, blue for the minutes - allow you to track the progressing time on the semicircle concentrically arranged in relation to the movement. A magnificent piece, a real sculpture for the wrist, in three unique series ([[red gold]] 5N, [[white gold]] and [[platinum]]). With a further surprise on the caseback is found as engraving on a gold plate the history of the "invention".

//(Press text)//

Invention Piece 1 was presented first in [[2007]].


<WRAP ud ud_mod>

**Movement:**
  * [[Manual winding]] [[manufacture movement]] calibre GF 02N, patented, 21,600 A/h
  * Double [[tourbillon]], one inside, 30° inclined, surrounded by a second 
  * 38 [[jewels]]
  * [[Power reserve]] 72 h

**Case:**
  * [[Red gold]], [[white gold]] or [[platinum]]
  * Ø 43.5 mm, H ? mm
  * [[Sapphire crystal]], domed, and transparent caseback
  * Manually hammered relief engraving with the history of the "Invention"
  * [[Waterproof]] to 3 atm

**Dial:**
  * Silver

**Functions:**
  * Hours, minutes, [[small seconds]]
  * Double tourbillon 30° excentric, rotation of the outer tourbillon in 4 minutes, rotation of the inner tourbillon in 6 seconds, sectoral minutes indication, seconds indication and sectoral [[power reserve indicator]]

**Bracelet:**
  * Black or brown hand-sewn Alligator strap with [[folding clasp]]
</WRAP>

{{tag>Watch_models Watches_with_tourbillon Greubel_Forsey_models}}