Linde Werdelin Dive & Ski Instruments

Whether you like to spend your free time under the sea or far, far above it, these Linde Werdelin Dive & Ski Instruments (1,200-1,800 CHF; roughly $1,300-$1,950) are worthy companions. Designed to clip on top of the company's watches but perfectly capable of standing on their own, these digital timepieces feature anodized aluminum cases, sapphire crystal screens, four-button menu systems, and angular cases. The skiing model — dubbed The Rock — measures altitude and has an external sensor for accurate measurement of air temperature, while its scuba counterpart — The Reef — provides accurate calculations of depth, oxygen percentage, and water temperature.

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