The Circadian

PRE-ORDER — Estimated shipping December 2026. Always ready. Ever vigilant. The Circadian honors the eight-hour rotation familiar to submariners. Its bezel carries three reminders of that rhythm: ON WATCH, ON-COMING, and OFF-GOING. Wherever you are in the rotation, the commitment remains the same: always ready to respond, ever vigilant. The Circadian introduces Tenacity Watches’ first Swiss movement, the Ronda 515, with a 24-hour display that reflects life on the watch. Two versions. Red, White & Blue: $379.00 — 250 available for this release. Blue, Gold & White: $399.00 — 50 available for this release. Specifications Swiss-made Ronda 515 movement 24-hour display Stainless-steel case Sapphire bezel with printed markings Flat sapphire front crystal with date magnifier Stainless-steel and sapphire-glass caseback Solid stainless-steel bracelet with safety buckle Green luminous dial markings and hands Screw-down crown Water resistance: 10 ATM Images show design renderings.