Twinspir

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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it was revealed that CSEM had threatened legal action to prevent further use of Twinspir and the product was rapidly withdrawn from the market.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