Editor’s note: Grand Seiko turned heads at the start of 2020 with the announcement of a brand new in-house movement – the Grand Seiko 9SA5 caliber. It was first launched in the Grand Seiko SLGH002 60th Anniversary Limited Edition, a quintessential yellow gold dress watch from the Japanese watchmaking firm, and it left jaws on the floor with what it had achieved. We saw the 9SA5 caliber again earlier this month in the Grand Seiko SLGH003, this time in a sportier watch in stainless steel that was a statement of intent from Grand Seiko. But what makes this new movement so special? We thought we’d get an independent watchmaker to answer that question, our friend Reuben Schoots. We first spoke with Reuben in NOW Magazine Issue II, about his journey building a tourbillon pocket watch according to the George Daniels method. By hand. You read that right. The first of its kind in Australia. By hand. So without further ado, here’s Reuben. Grand Seiko’s new movement, the 9SA5, boasts 80 hours of power reserve, a new movement architecture, a new escapement, a new balance, a beat rate of 36,000 vph, +5 to -3 seconds accuracy per day, oh, and the…
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