Grand Seiko Heritage SBGH301 40 mm

The Heritage SBGH301 uses a 40 mm case in Ever Brilliant Steel, with a matching Ever Brilliant Steel caseback beneath sapphire crystal. Its 13.3 mm thickness and 46.2 mm lug-to-lug span give the watch a strong round profile, complemented by a polished dial and dual-curved sapphire. LumiBrite, a screw-down crown and 100-metre water resistance add practical depth, while the see-through back leaves the mechanical centre of the watch visible.

Inside, the in-house 9S85 brings automatic Hi-Beat 36000 performance to the Heritage family. It carries 37 jewels, a single barrel and a 55-hour power reserve. It runs at 36,000 vph, with hand-winding and hacking seconds. The stated accuracy is +5/-3, and the calibre is associated with the Grand Seiko Standard. This pairing of Ever Brilliant Steel and 9S85 gives the SBGH301 a place among the collection's high-frequency mechanical references.