We didn’t expect anything less. To commend its 60th anniversary, Grand Seiko dispatches its new hi-beat mechanical type 9SA5, the establishment stone for a totally new age of Grand Seiko watches. Addressing a progression as progressive as the primary type 9S of 1998 – the base development controlling all watches in the Grand Seiko (notwithstanding Spring Drive) assortment to date – the new 9SA5 keeps up the high-beat recurrence yet expands the force save and adds an incredibly uncommon Dual Impulse Escapement. Making its debut journey installed the recently planned yellow gold time-and-date Grand Seiko 60th Anniversary SLGH002, the watch will be accessible at Grand Seiko stores in August 2020.
Raising the stakes with the 9SA5
The challenge for Seiko’s improvement group was to convey a similar degree of stable precision found in the current high-beat 36,000vph development (the 9Sxx hi-beat family) however expand the force save from 55 hours to 80 hours and thin down the development. To achieve this, three principal structures were upgraded from head to toe utilizing a combination of accuracy producing instruments, the time-sharpened change abilities of the watchmakers at the Grand Seiko’s Studio Shizukuishi and creative specialized solutions.
Dual Impulse Escapement
Developed altogether in-house, the new escapement wheel sends power straightforwardly to the equilibrium improving productivity (henceforth the 80-hour power save for a high-recurrence type). The oddity here is the dual impulse escapement – an extremely uncommon and amazing specialized arrangement. One way, power is sent straightforwardly to the equilibrium, in the other it is through the bed fork, as in a customary escapement. With this innovation, the locking and impulse capacities are separated – an answer giving likenesses the Audemars Piguet or the Omega Co-Axial escapements, for example.
Micro-electromechanical framework innovation (MEMS) was utilized to make the bed fork and escapement wheel with its eight star-formed arms (teeth) and layered tips. On account of the ultra-accuracy machining innovation, these indispensable components are machined to resiliences of one-millionth of a gram and are 5% lighter than others, which means less force is needed to turn them.
Grand Seiko Free-Sprung Balance and even stuff train
The Grand Seiko Caliber 9SA5 is outfitted with another free-sprung balance that is more impervious to stun and rubbing and holds its exactness for longer periods. Type 9S, for instance, depends on a level hairspring: the new 9SA5 uses an overcoil. To achieve the ideal shape for the overcoil, in excess of 80,000 reenactments were embraced in the lab.
The new type is 15% slimmer than the current 9S Grand Seiko high-beat type and has a stature of simply 5.18mm. This was achieved with an inventive even format of the barrel and stuff trains. The two barrels are masterminded in grouping to broaden the force hold from 55 to 80 hours. At last, the equilibrium is held set up by a cross-over scaffold – again something new for Grand Seiko, which guarantees more noteworthy strength and stun resistance.
The development is done in fastidious Grand Seiko style yet additionally presents new, more illustrative plan codes than in past watches. The delicate bend on the extensions is intended to summon the framework of Mount Iwate and a twist in the Shizukuishi stream that can be seen from the windows of the watchmaking studio. Additionally, the swaying weight is more open than previously, taking into consideration a superior perspective on the development. The stripes enriching the extensions show up less “industrial” and add a haute horlogerie finish to this type 9SA5, close by the blued screws and the liberally inclined scaffolds. This new development has a great deal of charm.
New case design
The new type 9SA5 makes its presentation inside the Grand Seiko 60th Anniversary Limited Edition SLGH002, a 18k yellow gold watch with a somewhat bigger case size of 40mm (39.5mm for 9S) however a lot slimmer profile of 11.7mm (13mm for 9S). Totally updated, the case currently includes more extensive carries for upgraded comfort. In any case, the fundamental distinction can be valued in the less fatty outline of the case and the delicate camber that permits it to sit completely on the wrist. Similarly as with all Grand Seiko models, the case finishing is standout with its combination of brushed surfaces – including the level piece of the bezel and the bended sides of the case – and the striking, mutilation free, reflect clean completion (Seiko’s incredible Zaratsu technique).
Abiding by the guidelines set down for the Grand Seiko Style in 1967 with the well known 44GS , neatness is awesome. Other distinguishing components remember the more conspicuous and thicker hour markers for 18k yellow gold (faceted and cleaned) and the bigger hour hand, the two highlights of the principal Grand Seiko of 1960. The date, sitting under the gold slanted edge, changes instantly.
The watch comes with an earthy colored crocodile tie with a 18k yellow gold three-overlap clasp.
Availability and price
The Grand Seiko 60th Anniversary SLGH002 is a restricted release of 100 pieces. It will retail in Europe for EUR 45,000 and will be accessible in August 2020 at Grand Seiko Boutiques. For more data, kindly visit grand-seiko.com .