====== Twinspir ======
**Twinspir** is a dual-layer [[silicon]] [[balance spring]] material used by [[Richemont]]'s [[ValFleurier]] since [[2017]]

Richemont was a decade behind the Swiss watch industry in developing a silicon balance spring, not being part of the [[Rolex]]/[[Patek Philippe]]/[[Swatch Group]]/[[CSEM]] group that developed and patented such materials. Twinsipr is a very different material as well It features two layers of silicon material bonded together with their crystal structure oriented in opposite directions. A third layer of silicon dioxide is used to bond the two layers together and provide temperature compensation.

Twinspir was introduced to the market in the limited-production [[2017]] [[Baume & Mercier Clifton Manual 1830]] before being introduced to full-production in the [[2018]] [[Baume & Mercier Clifton Baumatic]]. In [[2019]] it was revealed that CSEM had threatened legal action to prevent further use of Twinspir and the product was rapidly withdrawn from the market.

===== See Also =====
  * [[Spiromax]]


{{tag>Terms Richemont}}