Grand Seiko Heritage SBGA437 40 mm Silver Dial

The SBGA437 presents a silver sunburst dial in a 40 mm stainless-steel Heritage case, with the changing light across the surface supplying a quiet sense of depth. Its dual-curved sapphire crystal, LumiBrite, and 100-metre water resistance keep the design practical, while the power-reserve display gives the dial a clear connection to the movement beneath it.

Automatic Spring Drive Caliber 9R65 provides the date and 72-hour reserve through a central rotor and one barrel. Thirty jewels support the in-house calibre, whose Tri-synchro Regulator combines mechanical energy with a 32,768 Hz quartz reference for accuracy within one second per day. Hacking seconds permits exact setting, and the central seconds hand advances in a smooth, continuous glide.