Grand Seiko Heritage SBGH347 37 mm

The Heritage SBGH347 brings the Hi-Beat format into a 37 mm stainless-steel case. With a 44.6 mm lug-to-lug span and 13.3 mm thickness, its medium proportions are more compact than many high-frequency sports-oriented watches. Dual-curved sapphire, LumiBrite, a screw-down crown and 100-metre water resistance provide a practical frame, while the see-through caseback shows the movement. The round case and folding clasp retain the established Heritage vocabulary in a smaller, unisex format.

Its in-house 9S85 is an automatic Hi-Beat 36000 calibre with 37 jewels and a single barrel. The movement runs at 36,000 vph and stores 55 hours of power reserve, with hand-winding and hacking seconds included. Grand Seiko gives an accuracy of +5/-3 and lists the Grand Seiko Standard. Within the Heritage range, this reference makes the 9S85's high-frequency architecture the defining technical feature while keeping the case notably compact.