Grand Seiko has just announced its latest releases at Basel 2019 and, boy, does the Spring Drive — that unique trifecta of electronic, kinetic and magnetic energy — feature strongly. But not just the Spring Drives you know and love, with that arching power reserve at eight. No, in honour of the movement’s 20th anniversary, there are new manually wound versions, including this super-slender, refined and dressy option. Shown here in steel, it’s known as SBGY003
This is a Grand Seiko like you’ve never seen before. First, the case is so well-sized — 38.5mm across by 10.2mm thick is elegant, restrained proportion. With a simple case, with swooping lugs, a grippy crown (important for manual winding) and a black alligator strap, it’s a refined piece. It’s interesting to note that this is one of the few GS models where the lugs aren’t drilled.
Of course, the dial is impressive, too: a radial starburst-like guillochage, reminiscent of the popular Seiko Cocktail Time; it’s bright and crisp, with all the details you’d expect from the masters of the art. It’s also very clean, with no date or power reserve on show, as you might expect.
Just because you can’t see it, doesn’t mean it isn’t there. The caliber 9R31 (which, sadly, we can’t show here as this prototype had a dummy movement) displays the reserve on the back. That reserve is unchanged from the typical Spring Drive — 72 hours, thanks to the dual spring barrel. Accuracy is as strong as ever, at +/- 1 second a month. Twenty years on, the Spring Drive is still going strong.
Grand Seiko Spring Drive SBGY003 pricing and availability
Grand Seiko Spring Drive SBGY003, limited to 700 pieces, 8200 euro