Grand Seiko introduced their caliber 9SA5 in 2020 as one of their most advanced automatic movements produced to-date, featuring a dual impulse escapement. Similar to the co-axial escapement by George Daniels, the dual impulse mechanism provides two impulses, one at the entry and one at the exit points of the escapement, which reduces friction and energy loss enabling improved accuracy and efficiency. Fifteen percent slimmer via a novel, horizontal layout of the barrel and gear train, this innovative caliber demonstrates the brand’s commitment to pushing the boundaries of traditional watchmaking and achieving new levels of precision and performance. When first released, the caliber was used in two limited edition models, however in 2021 was used in the production of their Heritage Collection.

In 2021, Grand Seiko released the present limited edition platinum 140th anniversary “Hi-Beat” wristwatch in honour of the founding of the company by Kintaro Hattori. The watch is exquisitely finished and features the famed caliber 9SA5. Similar to other exceptional Grand Seiko timepieces, the love of and celebration of nature is embedded in the design. The Shizukuishi manufacture center is set in nature, and is a source of inspiration, and the dial of the present watch is inspired by the rings of a Cedar tree. The dial has a swirling pattern that transform in color depending on how light hits it, but has a look and feel of textured wood grain.

One of only 140 examples made, the present watch is in excellent overall condition and probably only worn a handful of times. It is accompanied by its certificate and presentation box.