PS Horology Tsuba 1720, Inspired by George Graham’s 18th-Century Watchmaking

At a glance

• The hand-finished 18k gold dial is laser-engraved and ceramic-lacquered, with redesigned hands for the outer hour ring and inner minute scale.
• The 316L steel case measures 38.3mm across and 8.91mm thick, with 30m water resistance. Its shaped sapphire caseback displays a historical map and the coordinates of George Graham’s former workshop.
• The Vaucher Manufacture calibre 5401 automatic micro-rotor movement provides a 48-hour power reserve.
• Limited to 28 pieces, the watch is priced at CHF 26,000 excluding taxes and shipping. First deliveries are expected in February 2027.