For an industry built on tracking time, the 1980s was a decade many Swiss watchmakers might prefer to forget.
Never mind the oil crises and the economic fallout that followed. The rise of quartz technology from Japan cast the longest shadow, threatening to derail centuries of craftsmanship at storied houses from Rolex to Omega.
But radical times called for radical measures, and it was Tissot that responded with one of the boldest innovations of the era: a quirky little timepiece called the RockWatch, which returns this year for its 40th anniversary.

A faithful reissue?
Although it was a commercial juggernaut in its day, and widely credited with saving Tissot from the quartz crises, the RockWatch was discontinued just seven years after its debut.
During that run, Tissot used more than a dozen different stones, including jasper, lapis and fossilized coral.