Step into a Revolution: Seiko's New Prospex Marinemaster Divers and Greubel Forsey's Final Balancier Convexe S² in Ceramic.

Seiko demonstrates its legacy in diving watches with the introduction of two limited edition models, the Marinemaster Divers HBF001 and HBF002. Partnering with JAMSTEC (Japan Agency for Marine-Earth Science and Technology), these models add a fresh twist to the revered 300m Marinemaster template. They are characterised by updated materials and a new movement, and sit at the top tier of Seiko’s range with 300 meters of water resistance and their high-end 8L-series movement.

The versions come at a cost of $3,600 for the standard black-dial HBF001 and $3,900 for the JAMSTEC limited-edition HBF002, both set to be available from July 2026.

Meanwhile, Greubel Forsey bids adieu to the Balancier Convexe S² after repositioning the brand towards smaller, high-cost models with a focus on wearability. The final two editions of the coveted Balancier Convexe S², limited to 11 pieces each, will be available in either white or black ceramic.