Dive watches and Seiko are a long and rich story – as we’ve seen recently with the 55th Anniversary Trilogy of jump watche s. This skill isn’t saved to the adulated Prospex assortment and Grand Seiko , the top of the line division of the Japanese brand, likewise profits by this. Today, part of its 2020 assortment, Grand Seiko presents another Spring Drive diver – ref. SLGA001 – in view of a plan previously utilized with the Hi-Beat 36000 Professional 600m SBGH255 . Be that as it may, the fundamental oddity isn’t here, however inside the vigorous titanium case, as the brand circumstantially discharge its spic and span age of Spring Drive development, the 9RA5. Slimmer, more exact and more powerful.
A brisk update about Spring Drive . Since 1999, Grand Seiko benefits for a third sort of development, close to its exemplary mechanical or quartz types. Spring Drive is a mixture, which targets combining the most awesome aspect the two universes. On one side, it includes a self-twisting ability to have never-ending energy (and no battery). On the second hand, it profits by the demonstrated exactness of a quartz controller – which is known to be undeniably more exact than a customary equilibrium/escapement couple. The outcome was a development that looked practically indistinguishable from a programmed type, as yet including numerous cog wheels and wheels, just altered on the controlling part with an electronic controller combined with a quartz precious stone – the so-called “Tri-synchro regulator”.
Until today, the majority of the Grand Seiko Spring Drive time-and-date watches were fueled by the 9R6x design, with 72 hours of force hold, a rather prominent and a decent yet very modern embellishment. Today, the brand dispatches the new Caliber 9R35, which is slimmer, all the more impressive, more exact and considerably more charming to look at… And it makes it debuts in a professional diver’s watch.
The new 5-day Spring Drive Caliber 9RA5
Spring Drive, still a restrictive innovation just utilized by Grand Seiko and Seiko, is today totally dominated by the two brands. Furthermore, since the general population has acknowledged the possibility of a top of the line watch controlled by a cross breed development, it was the ideal opportunity for Grand Seiko to carry a variety of enhancements to its particular innovation. What’s more, it is a goal-oriented development.
The thought of the Grand Seiko group was to improve all parts of its Spring Drive developments – size, execution, enrichment and usefulness – set another norm for any spring-controlled watch. The outcome is another age of development, with the type 9RA5. Compared to the current 9R6x age, which is utilized for example in the Snowflake SBGA211 , we’re talking about 60% more force hold, practically 1mm less in stature, a lot quicker date component and surprisingly better accuracy.
Slimmer, yet with more strength
The new Caliber 9RA5 is, above all else, a pristine engineering with updated plates and scaffolds. Likewise, new development of numerous parts has made conceivable to lessen the thickness from 5.8mm to 5.0mm. One of the critical components of this decrease of tallness is the re-situating of the Magic Lever.
Developed in-house in 1959, the Magic Lever supports the effectiveness of the programmed twisting component by utilizing the energy made by the development of the swaying weight in the two ways. In the new type, the new Offset Magic Lever is situated away from the focal point of the development to lessen its thickness. Amazingly, this is accomplished with no deficiency of winding proficiency. The stem and crown are likewise situated towards the rear of the case to bring down the focal point of gravity and accomplish a comfortable fit on the wrist.
While slimmer, the Caliber 9RA5 has improved inflexibility and stun opposition on account of the new design of the stuff train towards the focal point of the development and a focal extension that holds them together. This One-piece Center Bridge accomplishes a stun opposition that satisfies the ISO guideline for diver’s watches.
Up to 5 days of force reserve
Previous ages of Spring Drive developments were at that point conveying a comfortable 3-day or 72-hour power save – enough to leave the watch away for an end of the week and as yet making them work on Monday morning. In any case, this wasn’t enough for Grand Seiko.
The new Spring Drive 9RA5 joins two barrels which convey a force hold of as long as 120 hours – the purported “Dual-size Barrels.” They are various sizes to convey the force needed for the 5-day power save while streamlining the utilization of the restricted space inside the movement.
New gadgets for improved accuracy
While the past age of Spring Drive developments was given for an as of now impressive ±15 seconds of the month precision rate, Caliber 9RA5 has an exactness pace of ±10 seconds of the month on account of another IC bundle and to the choice of profoundly stable quartz oscillators that have experienced a three-month maturing process.
For the first run through in a Spring Drive development, the IC consolidates a sensor to gauge the temperature inside the development and is customized to compensate for any mistakes in the precious stone wavering rate which might be brought about by temperature change. The oscillator and sensor are vacuum-fixed into a solitary bundle to take out even the smallest temperature distinction between the two and this shield additionally lessens the conceivable impact of stickiness, friction based electricity or light impedance and along these lines keeps up the watch’s precision at the most noteworthy conceivable level.
The Grand Seiko Professional Diver’s 600m SLGA001
To present this new Spring Drive 9RA5 Caliber, we would have expected a decent, rich and top of the line watch… But all things being equal, Grand Seiko acquires it a hearty, lightweight plunge watch, the new Professional Diver’s 600m SLGA001.
This watch isn’t a curiosity in essence, however more the variation of another innovation in a definitely known habillage, presented back in 2017 with the Automatic Hi-Beat SBGH255. It is one intense diver’s, professionally-situated, which has all the contentions to compete with the most amazing aspect the business – think Sea-Dweller or Planet Ocean.
Shaped in a commonplace Grand Seiko way, with sharp aspects and a combination of brushed surfaces and cleaned complements, the SLGA001 is an enormous yet lightweight watch. The case estimates 46.9mm in distance across and 16mm in stature yet is created in focused energy titanium, which is 40% lighter than steel and more impenetrable to scratches. The crown is situated at 4 o’clock – a mark component of Seiko jump watches – and the date echoes this situation on the dial. Note something explicit on this watch; the case, precious stone and bezel are totally intended for simple and safe dismantling to clean the parts after a make a plunge pungent waters.
The Grand Seiko Professional Diver’s 600m SLGA001 comes with all the standard highlights, for example, a screw-down crown and screw caseback, a unidirectional bezel with clay embed, a hey def sapphire gem and is appraised to 600m in immersion jumping. The dial of this model is cleaner as well, with a matte blue foundation, applied lists and a force save situated at 10 o’clock. All the signs are loaded up with Lumebrite.
The SLGA001 is introduced in a unique Grand Seiko 60th anniversary box, with a focused energy titanium arm band with collapsing fasten and jumping augmentation, just as a tradable blue silicone strap.
Price and availability
The Grand Seiko Professional Diver’s 600m SLGA001 will be a restricted version of 700 pieces, accessible worldwide in August 2020. It will be valued at EUR 11,500. More subtleties at www.grand-seiko.com .