In 1969, Tissot’s Sidéral introduced fibreglass to watchmaking, followed swiftly by 1971’s Idea 2001 – the world’s first plastic mechanical watch (and a harbinger of Swatch’s bold steps come 1983) – both bold steps into crazy materials that could only lead to the collector ‘#IYKYK’ cult that is the ‘RockWatch’ of 1985, hewn from raw Alpine granite.
And it’s now back with a SLAM, wrangled into flawless shape exactly the same way, 40 years on, at the hands of the very same artisans who crafted the first edition in 1985.
A limited edition of 999 pieces, presented in an exclusive collector box designed to resemble a block of granite. Available only at select points of sale, each watch is a rare echo of the 1985 OG, representing both a chapter of Tissot’s story and a literal chunk of Switzerland itself.
While the original 1985 RockWatch featured red and yellow hands inspired by alpine trail markers, this new edition opts for nickel-plated hands, subtle and timeless, evoking the enduring sophistication of alpine stone.
Meanwhile, picking up their rock hammers years on, Tissot’s artisans are reminded that transforming raw granite into refined Ø38mm cases requires the same dogged technical mastery as 40 years back; a delicate balance of strength and finesse. This refined detail complements the 38mm granite case, which is paired with a supple black leather strap, offering contrast and comfort.
It all begins with granite sourced from the heart of the Alps. Granite extracted during the renovation of the Jungfrau Tunnel is delivered to the workshop in large blocks. Cylinders are then obtained through milling, which are further cut into smaller sections to reduce internal stress within the stone, making it easier to handle during the machining stages.
These blocks are then shaped and refined, gradually approaching the final case diameter of 38mm. The granite undergoes a meticulous grinding process, where controlled pressure and abrasive compounds are used to achieve a smooth, uniform surface. Guided by tools operating with micron-level precision to sculpt the outer profile, making sure each piece meets strict dimensional standards.
The font marking with the logo is then applied using pad printing, a technique that uses a soft silicone stamp to gently transfer the design onto the stone’s surface. A fine layer of acrylic paint is used, to ensure a crisp, lasting finish that complements the natural character of the stone.
Once the movement is assembled inside the container, the hands and the sapphire crystal are added. Tissot’s hands, crafted from stamped brass, are polished, and subtly curved to follow the contours of the granite surface.
After this, the final touches begin. The engraved case back featuring “Jungfrau – Top of Europe” and a unique serial number is carefully affixed and screwed into place and the bracelet is finally assembled.
Released in a limited edition of 999 pieces from POS only; $1,225; tissot.ch