The MB&F HM9 Sapphire Vision uses a sapphire case to show off its movement

High-end watchmaker MB&F has released a limited edition of its Horological Machine No. 9 (HM9) wristwatch called the "Sapphire Vision, which sets the movement inside a specially engineered, transparent, three-dimensional sapphire and precious metal case to show off the works.

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Category: Wearables, Technology

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